# List of Symphyotrichum species

Symphyotrichum is a genus of flowering plants in the tribe Astereae which includes the commonly cultivated New York aster (S. novi-belgii) and New England aster (S. novae-angliae). Its species are widespread in the Americas, including as far north as subarctic North America to as far south as Chile, Argentina, and the Falkland Islands. One species has a native range extending into eastern Eurasia.
Most of the species in the genus are perennials. The flower heads have white, pink, purple, or blue ray florets surrounding white to yellow disk florets. The disk floret corollas become pink, purple, or brown after pollination. The three species in section Conyzopsis have reduced or absent ray florets.
Symphyotrichum is the type genus of subtribe Symphyotrichinae. There are 98 species in the genus, some with varieties, and thirteen named hybrids. The genus is split into five subgenera: Chapmaniana, Astropolium, Virgulus, Ascendentes, and Symphyotrichum. Most of the species had been classified within the genus Aster until it was confirmed to be polyphyletic. The American asters now are separated into monophyletic genera based on multiple phylogenetic studies.

## Conventions

* NatureServe conservation categoriesConservation status GX Presumed Extinct (0 species) GH Possibly Extinct (0 species) G1 Critically Imperiled (3 species) G2 Imperiled (9 species) G3 Vulnerable (7 species) G4 Apparently Secure (21 species) G5 Secure (37 species)Other categories GNA Not Applicable (8 species) GNR Not Ranked (0 species) NL Not listed (25 species)
Conservation status codes follow the NatureServe conservation (NS) rounded global status scheme. Hybrids have a column for parents in place of conservation status. Not listed (NL) is not a NatureServe category but is used here to represent those left out of global status rankings up to G5 (including GNA and GNR) and those not in NatureServe. Type species for each clade are in a separate table.
Legend :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) [and varieties] | NS | Habitat | Distribution |
| Abbreviated scientific name, link to species article, and picture, if available | Author citation | Basionym | Year of the original species description | Common name(s) and varieties, if applicable | NatureServe rounded global conservation status | Habitat | Distribution map |

## Classification
### Classification of Symphyotrichum

Astereae 
Symphyotrichinae 
Canadanthus$^{:818}$
Ampelaster$^{:818}$
Sanrobertia$^{:1}$
Almutaster$^{:818}$
Psilactis$^{:818}$
Symphyotrichum$^{:818}$
(other subtribes) :
Cladogram references
1 2 3 4 5
Morgan, D.R.; Holland, B. (2012). "Systematics of Symphyotrichinae (Asteraceae: Astereae): Disagreements Between Two Nuclear Regions Suggest a Complex Evolutionary History". Systematic Botany. 37 (3). American Society of Plant Taxonomists: 818–832. doi:10.1600/036364412X648760. JSTOR 41515169. S2CID 84007309.
Nesom, G.L. (2018). "Aster gypsophilus (Asteraceae) Segregated as the Monotypic Genus Sanrobertia" (PDF). Phytoneuron. 2018 (25). Fort Worth, Texas: 1–8. ISSN 2153-733X. Retrieved 25 November 2020. :

### Classification within Symphyotrichum

Most of the species had been classified within the genus Aster until it was confirmed to be polyphyletic – as previously defined, the genus Aster contained groups of species with different most recent ancestors. The American asters were then separated into several genera based on morphological characteristics and phylogenetic studies.
Within Symphyotrichum, S. novae-angliae and S. turbinellum are monotypic within sections. S. novae-angliae is classified in the subgenus Virgulus. In 1994, it was placed in section Grandiflori, subsection Polyligulae. In 2002, it was segregated within its own section Polyliguli. The list follows the 2002 circumscription of section Polyliguli for the species. S. turbinellum is classified in the subgenus Symphyotrichum. It has been placed within its own section Turbinelli. It was previously placed in section Symphyotrichum, subsection Turbinelli. The list follows the more recent circumscription of section Turbinelli for the species.
Clades
* Symphyotrichum subg. Chapmaniana (Semple) Semple
* Symphyotrichum subg. Astropolium (Nutt.) Semple
* Symphyotrichum subg. Virgulus (Raf.) G.L.Nesom
** sect. Ericoidei (Torr. & A.Gray) G.L.Nesom
** sect. Patentes (Torr. & A.Gray) G.L.Nesom
*** subsect. Brachyphylli (Torr. & A.Gray) G.L.Nesom
*** subsect. Patentes
** sect. Grandiflori (Torr. & A.Gray) G.L.Nesom
*** subsect. Mexicanae G.L.Nesom
*** subsect. Grandiflori (Torr. & A.Gray) G.L.Nesom
** sect. Polyliguli (Semple & Brouillet) Semple
** sect. Concolores (Torr. & A.Gray) G.L.Nesom
* Symphyotrichum subg. Ascendentes (Rydb.) Semple
* Symphyotrichum subg. Symphyotrichum
** sect. Conyzopsis (Torr. & A.Gray) G.L.Nesom
** sect. Occidentales (Rydb.) G.L.Nesom
** sect. Turbinelli (Rydb.) Semple
** sect. Symphyotrichum
*** subsect. Dumosi (Torr. & A.Gray) G.L.Nesom
*** subsect. Heterophylli (Nees) Semple
**** series Concinni (Nees) Semple
**** series Cordifolii (G.Don in Loudon) Semple
*** subsect. Porteriani (Rydb.) G.L.Nesom
*** subsect. Symphyotrichum
**** series Punicei (House) Semple
**** series Symphyotrichum
Type species :
| Clade | Type species |
| Genus Symphyotrichum | S. novi-belgii |
| Subgenus Chapmaniana | S. chapmanii |
| Subgenus Astropolium | S. tenuifolium |
| Subgenus Virgulus | S. concolor |
| Section Ericoidei | S. ericoides |
| Section Patentes | S. patens |
| Subsection Brachyphylli | S. walteri |
| Subsection Patentes | S. patens |
| Section Grandiflori | S. grandiflorum |
| Subsection Mexicanae | S. moranense |
| Subsection Grandiflori | S. grandiflorum |
| Section Polyliguli | S. novae-angliae |
| Section Concolores | S. concolor |
| Subgenus Ascendentes | S. ascendens |
| Subgenus Symphyotrichum | S. novi-belgii |
| Section Conyzopsis | S. ciliatum |
| Section Occidentales | S. spathulatum |
| Section Turbinelli | S. turbinellum |
| Section Symphyotrichum | S. novi-belgii |
| Subsection Dumosi | S. dumosum |
| Subsection Heterophylli | S. cordifolium |
| Series Concinni | S. laeve |
| Series Cordifolii | S. cordifolium |
| Subsection Porteriani | S. porteri |
| Subsection Symphyotrichum | S. novi-belgii |
| Series Punicei | S. puniceum |
| Series Symphyotrichum | S. novi-belgii |
* Symphyotrichum subg. Chapmaniana$^{:133}$ S. chapmanii subg. Astropolium$^{:133}$ S. divaricatum S. glabrifolium S. graminifolium S. martii S. parviflorum S. patagonicum S. peteroanum S. potosinum S. regnellii S. subulatum S. tenuifolium S. vahlii subg. Virgulus$^{:272}$ sect. Ericoidei$^{:274}$ S. ericoides S. falcatum sect. Patentes$^{:274}$ ssect. Brachyphylli$^{:274}$ S. adnatum S. walteri ssect. Patentes$^{:274}$ S. georgianum S. patens S. phlogifolium sect. Grandiflori$^{:273}$ ssect. Mexicanae$^{:273}$ S. bimater S. chihuahuense S. hintonii S. moranense S. purpurascens S. trilineatum S. turneri ssect. Grandiflori$^{:273}$ S. campestre S. estesii S. fendleri S. fontinale S. grandiflorum S. oblongifolium S. pygmaeum S. yukonense sect. Polyliguli$^{:133}$ S. novae-angliae sect. Concolores$^{:275}$ S. concolor S. lucayanum S. plumosum S. pratense S. sericeum subg. Ascendentes$^{:133}$   S. ascendens S. defoliatum subg. Symphyotrichum$^{:267}$ sect. Conyzopsis$^{:271}$ S. ciliatum S. frondosum S. laurentianum sect. Occidentales$^{:271}$ S. chilense S. eatonii S. foliaceum S. greatae S. hallii S. hendersonii S. jessicae S. lentum S. molle S. spathulatum S. subspicatum sect. Turbinelli$^{:133}$ S. turbinellum sect. Symphyotrichum$^{:268}$ ssect. Dumosi$^{:269}$ S. boreale S. bullatum S. burgessii S. carnerosanum S. dumosum S. eulae S. lanceolatum S. lateriflorum S. leone S. nahanniense S. ontarionis S. praealtum S. racemosum S. schaffneri S. simmondsii S. tradescantii S. welshii ssect. Heterophylli$^{:133}$ ser. Concinni$^{:133}$   S. laeve S. oolentangiense ser. Cordifolii$^{:133}$   S. anomalum S. ciliolatum S. cordifolium S. drummondii S. shortii S. undulatum S. urophyllum ssect. Porteriani$^{:270}$ S. depauperatum S. kentuckiense S. parviceps S. pilosum S. porteri ssect. Symphyotrichum ser. Punicei$^{:133}$ S. elliottii S. firmum S. prenanthoides S. puniceum S. rhiannon ser. Symphyotrichum S. anticostense S. novi-belgii S. retroflexum S. robynsianum Cladogram references 1 2 3 4 5 6 7 8 9 Semple, J.C.; Heard, S.B.; Brouillet, L. (2002). "Cultivated and Native Asters of Ontario (Compositae: Astereae)". University of Waterloo Biology Series. 41. Ontario: University of Waterloo: 1–134. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Nesom, G.L. (September 1994). "Review of the Taxonomy of Aster sensu lato (Asteraceae: Astereae), Emphasizing the New World Species". Phytologia. 77 (3) (published 31 January 1995): 141–297. ISSN 0031-9430. Retrieved 23 August 2021 – via Biodiversity Heritage Library. ↑ Sugbenus Ascendentes is made up of two allopolyploid species with historic parents from subg. Virgulus and subg. Symphyotrichum.

## Species list
### Subgenus Chapmaniana

Subgenus Chapmaniana (Semple) Semple – one species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. chapmanii | (Torr. & A.Gray) Semple & Brouillet | Aster chapmanii | 1841 | Savanna aster | G2 | Wetlands, bogs, acid swamps 0–30 m (0–100 ft) | |

### Subgenus Astropolium

Subgenus Astropolium (Nutt.) Semple – twelve species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. divaricatum | (Nutt.) G.L.Nesom | Tripolium divaricatum | 1840 | Southern annual saltmarsh aster | G5 | Marshy habitats, roadsides, lawns, and waste places 0–1,500 m (0–4,921 ft) |
| S. glabrifolium | (DC.) G.L.Nesom | Erigeron glabrifolius | 1836 | | NL | Wet meadows and stream edges 1,500–2,400 m (4,920–7,870 ft) |
| S. graminifolium | (Spreng.) G.L.Nesom | Conyza graminifolia | 1826 | | NL | Humid places |
| S. martii | (Baker) G.L.Nesom | Aster martii | 1882 | | NL | Cerrado savanna, grasslands |
| S. parviflorum | (Nees) G.L.Nesom | Aster parviflorus | 1818 | Southwestern annual saltmarsh aster | NL | Marshy habitats and roadsides 0–1,100 m (0–3,609 ft) |
| S. patagonicum | (Cabrera) G.L.Nesom | Aster patagonicus | 1971 | | NL | Mallines and lagoon edges 500–2,500 m (1,640–8,200 ft) |
| S. peteroanum | (Phil.) G.L.Nesom | Aster peteroanus | 1894 | | NL | Humid montane ecosystems 1,000–2,200 m (3,280–7,220 ft) |
| S. potosinum | (A.Gray) G.L.Nesom | Aster potosinus | 1880 | Santa Rita Mountain aster | G2 | Muddy and wet soils on stream banks 1,500–1,900 m (4,920–6,230 ft) |
| S. regnellii | (Baker) G.L.Nesom | Aster regnellii | 1882 | | NL | Swamps or damp savanna soils |
| S. subulatum | (Michx.) G.L.Nesom | Aster subulatus | 1803 | Annual saltmarsh asterEastern annual saltmarsh aster Three varieties S. s. var. subulatum S. s. var. elongatum (Bahaman aster) S. s. var. squamatum (southeastern annual saltmarsh aster) | G5 | Brackish marshes, salt marshes, roadsides 0–4,000 m (0–13,120 ft) |
| S. tenuifolium | (L.) G.L.Nesom | Aster tenuifolius | 1753 | Perennial saltmarsh aster Two varieties S. t. var. tenuifolium S. t. var. aphyllum (Brace’s aster) | G5 | Coastal salt marshes, brackish marshes, low pine woods 0–10 m (0–30 ft) |
| S. vahlii | (Gaudich.) G.L.Nesom | Erigeron vahlii | 1825 | MargaritaMarsh daisy Two varieties S. v. var. vahlii S. v. var. tenuifolium | NL | Grassland, heathland, peaty soil, sandy soil 20–1,200 m (70–3,940 ft) |

### Subgenus Virgulus

Subgenus Virgulus (Raf.) G.L.Nesom

#### Section Ericoidei

Section Ericoidei (Torr. & A.Gray) G.L.Nesom – two species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat | Distribution |
| S. ericoides | (L.) G.L.Nesom | Aster ericoides | 1753 | White heath aster Two varieties S. e. var. ericoides S. e. var. pansum | G5 | Open locations with sandy, gravelly, or disturbed soil 30–2,400 m (100–7,870 ft) | |
| S. falcatum | (Lindl.) G.L.Nesom | Aster falcatus | 1834 | Western heath asterWhite prairie aster Two varieties S. f. var. falcatum S. f. var. commutatum | G5 | Well-drained soils, stream banks and slopes, and others 200–2,500 m (660–8,200 ft) | |

#### Section Patentes

Section Patentes (Torr. & A.Gray) G.L.Nesom

##### Subsection Brachyphylli

Subsection Brachyphylli (Torr. & A.Gray) G.L.Nesom – two species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. adnatum | (Nutt.) G.L.Nesom | Aster adnatus | 1834 | Scaleleaf aster | G4 | Sandy soils, scrub, woods 0–100 m (0–330 ft) | |
| S. walteri | (Alexander) G.L.Nesom | Aster walteri | 1933 | Walter's aster | G4 | Sandy and clay soils, woods edges, open areas 0–100 m (0–330 ft) | |

##### Subsection Patentes

Subsection Patentes – three species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. georgianum | (Alexander) G.L.Nesom | Aster georgianus | 1933 | Georgia aster | G3 | Sandy or clay soil, woodlands, mostly Piedmont 0–300 m (0–980 ft) |
| S. patens | (Aiton) G.L.Nesom | Aster patens | 1789 | Late purple asterSpreading aster Three varieties S. p. var. patens S. p. var. gracile S. p. var. patentissimum | G5 | Dry woodlands, sandy or clay soils, fields 0–1,000 m (0–3,280 ft) |
| S. phlogifolium | (Muhl. ex Willd.) G.L.Nesom | Aster phlogifolius | 1803 | Thinleaf late purple aster | G5 | Various soils, rich mesic hardwood forests 0–1,100 m (0–3,610 ft) |

#### Section Grandiflori

Section Grandiflori (Torr. & A.Gray) G.L.Nesom

##### Subsection Mexicanae

Subsection Mexicanae G.L.Nesom – seven species :
| Scientific name and picture | Author citation | Basionym | Year | NS | Habitat |
| S. bimater | (Standl. & Steyerm.) G.L.Nesom | Aster bimater | 1944 | NL | Pine-oak woods, ravines, slopes, grassy openings 1,000–2,150 m (3,280–7,050 ft) |
| S. chihuahuense | G.L.Nesom | | 2018 | NL | Grassland, oak-pine woods 1,800–2,500 m (5,910–8,200 ft) |
| S. hintonii | (G.L.Nesom) G.L.Nesom | Aster hintonii | 1989 | NL | Oak and oak-pine woods 1,400–2,200 m (4,590–7,220 ft) |
| S. moranense | (Kunth) G.L.Nesom | Aster moranensis | 1818 | NL | Grassland, woodlands 1,000–2,750 m (3,280–9,020 ft) |
| S. purpurascens | (Sch.Bip.) G.L.Nesom | Aster purpurascens | 1854 | NL | Open woods 1,500–2,850 m (4,920–9,350 ft) |
| S. trilineatum | (Sch.Bip. ex Klatt) G.L.Nesom | Aster trilineatus | 1884 | NL | Mountains (sierra) 975–2,840 m (3,200–9,320 ft) |
| S. turneri | (S.D.Sundb. & A.G.Jones) G.L.Nesom | Aster moranensis var. turneri | 1986 | NL | Woods, along waterways, and in wet pastures 2,050–2,750 m (6,730–9,020 ft) |

##### Subsection Grandiflori

Subsection Grandiflori (Torr. & A.Gray) G.L.Nesom – eight species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. campestre | (Nutt.) G.L.Nesom | Aster campestris | 1840 | Western meadow aster | G5 | Dry habitats, rocky and sandy soils near ponds and streams 1,500–2,500 m (4,920–8,200 ft) | |
| S. estesii | Semple | | 2019 | May Prairie asterEstes's aster | G1 | Hydroxeric soils in open, sunny, flat prairies Approx. 330 m (1,070 ft) | May Prairie State Natural Area Coffee County, Tennessee (US) |
| S. fendleri | (A.Gray) G.L.Nesom | Aster fendleri | 1849 | Fendler's aster | G4 | Open, sandy, silty, shaly, often rocky soils and similar 600–2,000 m (1,970–6,560 ft) | |
| S. fontinale | (Alexander) G.L.Nesom | Aster fontinalis | 1933 | Florida water aster | G3 | Marshes, sandhills, hammocks, flood plains, streams 0–50 m (0–160 ft) | |
| S. grandiflorum | (L.) G.L.Nesom | Aster grandiflorus | 1753 | Large-flowered aster | G4 | Sandy soils and hills, thickets, roadsides 0–200 m (0–660 ft) and higher | |
| S. oblongifolium | (Nutt.) G.L.Nesom | Aster oblongifolius | 1818 | Aromatic asterOblong-leaved aster | G5 | Open and dry, rocky or sandy soils 100–1,500 m (330–4,920 ft) | |
| S. pygmaeum | (Lindl.) Brouillet & Selliah | Aster pygmaeus | 1834 | Pygmy aster | G4 | Sandy or silty wet areas, gravelly tundra, tundra slopes 0–200 m (0–660 ft) | |
| S. yukonense | (Cronquist) G.L.Nesom | Aster yukonensis | 1945 | Yukon aster | G3 | Mud flats, rocky or silty lakeshores 300–1,500 m (980–4,920 ft) | |

#### Section Polyliguli

Section Polyliguli (Semple & Brouillet) Semple – one species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. novae-angliae | (L.) G.L.Nesom | Aster novae-angliae | 1753 | New England aster | G5 | Open, typically moist habitats 0–1,600 m (0–5,250 ft) | |

#### Section Concolores

Section Concolores (Torr. & A.Gray) G.L.Nesom – five species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat | Distribution |
| S. concolor | (L.) G.L.Nesom | Aster concolor | 1753 | Eastern silver aster Two varieties S. c. var. concolor S. c. var. devestitum | G5 | Scrub, flatwoods, fields, roadsides 0–600 m (0–1,970 ft) | |
| S. lucayanum | (Britton) G.L.Nesom | Aster lucayanus | 1906 | Pineland aster | NL | Pine woodlands and wetland edges 0–12 m (0–40 ft) | Endemic to the island of Grand Bahama |
| S. plumosum | (Small) Semple | Aster plumosus | 1924 | | G2 | Deep, sandy soils, pine flatwoods, pine-scrub oak woods 0–40 m (0–130 ft) | |
| S. pratense | (Raf.) G.L.Nesom | Aster pratensis | 1817 | Barrens silky aster | G4 | Prairies and fields, woodland and scrub, roadsides 0–500 m (0–1,640 ft) | |
| S. sericeum | (Vent.) G.L.Nesom | Aster sericeus | 1800 | Western silvery aster | G5 | Many open habitats 100–500 m (330–1,640 ft) | |

#### Subgenus Virgulus named hybrids

Subgenus Virgulus named hybrids – three :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | Parents | Habitat |
| S. × amethystinum | (Nutt.) G.L.Nesom | Aster amethystinus | 1840 | Amethyst aster | S. ericoides × S. novae-angliae | Prairies or fields, disturbed ground, near parent plants 200–400 m (660–1,310 ft) |
| S. × batesii | (Rydb.) G.L.Nesom | Aster batesii | 1931 | | S. ericoides × S. oblongifolium | |
| S. × columbianum | (Piper) G.L.Nesom | Aster columbianus | 1913 | | S. campestre × S. ericoides | |

### Subgenus Ascendentes

This subgenus contains two allopolyploid species derived from the historic hybridization of plants from the subgenera Symphyotrichum and Virgulus.
Subgenus Ascendentes (Rydb.) Semple – two species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. ascendens | (Lindl.) G.L.Nesom | Aster ascendens | 1834 | Long-leaved asterIntermountain asterWestern aster | G5 | Grasslands, sagebrush steppe, meadows 500–3,200 m (1,640–10,500 ft) | |
| S. defoliatum | (Parish) G.L.Nesom | Aster defoliatus | 1904 | San Bernardino aster | G2 | Seeps, marshes, swamps, meadows, montane forests, coastal scrubs 0–2,050 m (0–6,730 ft) | |

### Subgenus Symphyotrichum
#### Section Conyzopsis

The three species in section Conyzopsis have reduced or absent ray florets.
Section Conyzopsis (Torr. & A.Gray) G.L.Nesom – three species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat |
| S. ciliatum | (Ledeb.) G.L.Nesom | Erigeron ciliatus | 1829 | Rayless annual asterRayless alkali aster | G5 | Moist prairies, steppes, salty areas (natural or manmade) 0–2,000 m (0–6,560 ft) |
| S. frondosum | (Nutt.) G.L.Nesom | Tripolium frondosum | 1840 | Short-rayed alkali aster | G4 | Wet meadows, marshes, saline conditions 10–2,200 m (30–7,220 ft) |
| S. laurentianum | (Fernald) G.L.Nesom | Aster laurentianus | 1914 | Gulf of St. Lawrence aster | G1 | Brackish or salty marshes, shores, and dunes Sea level (0 m (0 ft)) |

#### Section Occidentales

Section Occidentales (Rydb.) G.L.Nesom – eleven species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. chilense | (Nees) G.L.Nesom | Aster chilensis | 1832 | Pacific asterCommon California aster | G5 | Coastal salt marshes, dunes and banks, grasslands, coniferous forests 0–500 m (0–1,640 ft) |
| S. eatonii | (A.Gray) G.L.Nesom | Aster foliaceus var. eatonii | 1884 | Eaton's aster | G5 | Sunny wetlands 500–3,100 m (1,640–10,170 ft) |
| S. foliaceum | (Lindl. ex DC.) G.L.Nesom | Aster foliaceus | 1836 | Alpine leafybract asterLeafy asterLeafy-bracted aster Five varieties S. f. var. foliaceum S. f. var. apricum S. f. var. canbyi S. f. var. cusickii (Cusick's aster) S. f. var. parryi | G5 | Meadows, open areas in woods, slopes, grasslands 1,000–3,600 m (3,280–11,810 ft) |
| S. greatae | (Parish) G.L.Nesom | Aster greatae | 1902 | Greata's aster | G2 | Damp places in canyons of the south slopes of the San Gabriel Mountains of California 300–2,000 m (980–6,560 ft) |
| S. hallii | (A.Gray) G.L.Nesom | Aster hallii | 1872 | Hall's aster | G4 | Grasslands and meadows with summer dryness 0–500 m (0–1,640 ft) |
| S. hendersonii | (Fernald) G.L.Nesom | Aster hendersonii | 1895 | Henderson's aster | G4 | Meadows, forest openings, banks 1,000–1,500 m (3,280–4,920 ft) and higher |
| S. jessicae | (Piper) G.L.Nesom | Aster jessicae | 1898 | Jessica's aster | G2 | Dry grasslands, meadows, banks, woodland openings 500–1,200 m (1,640–3,940 ft) |
| S. lentum | (Greene) G.L.Nesom | Aster lentus | 1894 | Suisun marsh aster | G2 | Freshwater marshes and swamps 0–300 m (0–980 ft) |
| S. molle | (Rydb.) G.L.Nesom | Aster mollis | 1901 | Soft aster | G3 | Dry montane meadows 2,000–3,000 m (6,560–9,840 ft) |
| S. spathulatum | (Lindl.) G.L.Nesom | Aster spathulatus | 1834 | Western mountain aster Three varieties S. s. var. spathulatum S. s. var. intermedium S. s. var. yosemitanum (western bog aster) | G5 | Montane meadows, open woodlands 100–2,900 m (330–9,510 ft) |
| S. subspicatum | (Nees) G.L.Nesom | Aster subspicatus | 1832 | Douglas's aster | G5 | Disturbed and weedy open areas, marshes, thickets 0–1,000 m (0–3,280 ft) |

#### Section Turbinelli

Section Turbinelli (Rydb.) Semple – one species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | NS | Habitat | Distribution |
| S. turbinellum | (Lindl.) G.L.Nesom | Aster turbinellus | 1835 | Prairie aster | G4 | Generally dry, acidic soils 60–900 m (200–2,950 ft) | |

#### Section Symphyotrichum
##### Subsection Dumosi

Subsection Dumosi (Torr. & A.Gray) G.L.Nesom – seventeen species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat | Distribution |
| S. boreale | (Torr. & A.Gray) Á.Löve & D.Löve | Aster laxifolius var. borealis | 1841 | Rush asterSlender white asterNorthern bog aster | G5 | Calcareous areas, wetland areas 0–1,500 m (0–4,920 ft) | |
| S. bullatum | (Klatt) G.L.Nesom | Aster bullatus | 1894 | | NL | Wet ledges 37–1,750 m (120–5,740 ft) | |
| S. burgessii | (Britton) G.L.Nesom | Aster burgessii | 1914 | | NL | Rocky river banks | |
| S. carnerosanum | (S.Watson) G.L.Nesom | Aster carnerosanus | 1891 | | NL | 495–2,850 m (1,620–9,350 ft) | |
| S. dumosum | (L.) G.L.Nesom | Aster dumosus | 1753 | Bushy aster | G5 | Wetlands, muddy or mucky areas, sand, woods 0–700 m (0–2,300 ft) | |
| S. eulae | (Shinners) G.L.Nesom | Aster eulae | 1950 | Eula's aster | G4 | Part shade, soils with clay or silt, bottom areas or stream banks 0–100 m (0–330 ft) | Endemic to Texas |
| S. lanceolatum | (Willd.) G.L.Nesom | Aster lanceolatus | 1803 | Lance-leaved asterPanicled asterWhite panicled aster Five varieties S. l. var. lanceolatum S. l. var. hesperium S. l. var. hirsuticaule S. l. var. interior S. l. var. latifolium | G5 | Stream banks, thickets, borders, ditches, meadows, mucky soils (depending on variety) 10–2,700 m (30–8,860 ft) | |
| S. lateriflorum | (L.) Á.Löve & D.Löve | Solidago lateriflora | 1753 | Calico asterWhite woodland asterSide-flowering aster | G5 | Mostly shade, dry to humid soils, woodland edges 0–400 m (0–1,310 ft) | |
| S. leone | (Britton) G.L.Nesom | Aster leonis | 1920 | | NL | Marshes | |
| S. nahanniense | (Cody) Semple | Aster nahanniensis | 1974 | Nahanni aster | G3 | Stream banks near hot mineral springs About 1,000 m (3,280 ft) | Nahanni National Park Reserve Northwest Territories (Canada) |
| S. ontarionis | (Wiegand) G.L.Nesom | Aster ontarionis | 1928 | Ontario asterBottomland aster Two varieties S. o. var. ontarionis S. o. var. glabratum | G5 | Moist soils or shores, other wetlands, field edges 10–300 m (30–980 ft) | |
| S. praealtum | (Poir.) G.L.Nesom | Aster praealtus | 1811 | Willowleaf asterWillow aster | G5 | Usually moist and wet areas 0–400 m (0–1,310 ft) | |
| S. racemosum | (Elliott) G.L.Nesom | Aster racemosus | 1823 | Small white asterSmooth white oldfield aster | G4 | Moist to wet, often brackish, soils 0–200 m (0–660 ft) | |
| S. schaffneri | (S.D.Sundb. & A.G.Jones) G.L.Nesom | Aster schaffneri | 1986 | | NL | Disturbed oak forests, secondary vegetation areas, mountain mesophilic forests, rich black or brown soils 120–2,500 m (390–8,200 ft) | |
| S. simmondsii | (Small) G.L.Nesom | Aster simmondsii | 1913 | Simmonds' aster | G4 | Moist to dry soils 0–50 m (0–160 ft) | |
| S. tradescantii | (L.) G.L.Nesom | Aster tradescantii | 1753 | Tradescant's asterShore aster | G4 | Shores, streams, freshwater estuaries 0–200 m (0–660 ft) | |
| S. welshii | (Cronquist) G.L.Nesom | Aster welshii | 1994 | Welsh's aster | G2 | Wet soils in dry areas 1,300–2,300 m (4,270–7,550 ft) | |

##### Subsection Heterophylli

Subsection Heterophylli (Nees) Semple

###### Series Concinni

Series Concinni (Nees) Semple – two species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat | Distribution |
| S. laeve | (L.) Á.Löve & D.Löve | Aster laevis | 1753 | Smooth aster Four varieties S. l. var. laeve S. l. var. concinnum S. l. var. geyeri (Geyer’s aster) S. l. var. purpuratum | G5 | Open and dry habitats 0–2,400 m (0–7,870 ft) | |
| S. oolentangiense | (Riddell) G.L.Nesom | Aster oolentangiensis | 1835 | Azure asterSkyblue aster | G5 | Dry or dry to wet habitats 50–500 m (160–1,640 ft) | |

###### Series Cordifolii

Series Cordifolii (G.Don in Loudon) Semple – seven species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. anomalum | (Engelm.) G.L.Nesom | Aster anomalus | 1843 | Manyray aster | G4 | Dry soils over limestone, acid soils 50–500 m (160–1,640 ft) |
| S. ciliolatum | (Lindl.) Á.Löve & D.Löve | Aster ciliolatus | 1836 | Lindley's asterFringed blue aster | G5 | Rich, open deciduous forests, trails, stream banks 0–2,000 m (0–6,560 ft) |
| S. cordifolium | (L.) G.L.Nesom | Aster cordifolius | 1753 | Heartleaf asterCommon blue wood aster | G5 | Mostly rich, moist soils and woods 0–1,200 m (0–3,940 ft) |
| S. drummondii | (Lindl.) G.L.Nesom | Aster drummondii | 1835 | Drummond's aster Two varieties S. d. var. drummondii S. d. var. texanum (Texas aster) | G5 | Old fields, woodlands, savannas depending on variety 0–500 m (0–1,640 ft) |
| S. shortii | (Lindl.) G.L.Nesom | Aster shortii | 1834 | Short's aster | G5 | Thin rocky soils of woodlands and thickets often around limestone bluffs 100–500 m (330–1,640 ft) |
| S. undulatum | (L.) G.L.Nesom | Aster undulatus | 1753 | Wavyleaf aster | G5 | Dry or well-drained loamy or rocky soils 200–1,500 m (660–4,920 ft) |
| S. urophyllum | (Lindl.) G.L.Nesom | Aster urophyllus | 1836 | White arrowleaf asterArrowleaf aster | G4 | Open, dry to mesic habitats 40–300 m (130–980 ft) and higher |

##### Subsection Porteriani

Subsection Porteriani (Rydb.) G.L.Nesom – five species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. depauperatum | (Fernald) G.L.Nesom | Aster depauperatus | 1908 | Serpentine asterStarved aster | G2 | Serpentine or diabasic soils 400–1,000 m (1,310–3,280 ft) |
| S. kentuckiense | (Britton) Medley | Aster kentuckiensis | 1901 | Price's asterKentucky aster | G4 | Limestone cedar glades and limestone roadsides |
| S. parviceps | (E.S.Burgess) G.L.Nesom | Aster ericoides var. parviceps | 1898 | Smallhead asterSmall white aster | G4 | Dry, sandy, or loamy soils; barrens, fields, roadsides, old cemeteries 200–400 m (660–1,310 ft) |
| S. pilosum | (Willd.) G.L.Nesom | Aster pilosus | 1803 | Hairy asterFrost asterHairy white oldfield aster Two varieties S. p. var. pilosum S. p. var. pringlei (Pringle's aster) | G5 | Various and many, depending on variety 0–1,100 m (0–3,610 ft) |
| S. porteri | (A.Gray) G.L.Nesom | Aster porteri | 1881 | Porter's asterSmooth white aster | G3 | Rocky Mountain foothills 1,800–2,900 m (5,910–9,510 ft) |

##### Subsection Symphyotrichum
###### Series Punicei

Series Punicei (House) Semple – five species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat | Distribution |
| S. elliottii | (Torr. & A.Gray) G.L.Nesom | Aster elliottii | 1841 | Elliott's aster | G4 | Swamps, bogs, marshes, brackish marshes 0–50 m (0–160 ft) | |
| S. firmum | (Nees) G.L.Nesom | Aster firmus | 1818 | Glossy-leaved aster | G5 | Wet soils, fens, marshes 100–400 m (330–1,310 ft) | |
| S. prenanthoides | (Muhl. ex Willd.) G.L.Nesom | Aster prenanthoides | 1803 | Crookedstem aster | G4 | Mostly wetlands such as swamps and seeps 100–1,500 m (330–4,920 ft) | |
| S. puniceum | (L.) Á.Löve & D.Löve | Aster puniceus | 1753 | Purplestem asterRed-stemmed asterSwamp aster Two varieties S. p. var. puniceum S. p. var. scabricaule (roughstem aster) | G5 | Wetlands 0–2,000 m (0–6,560 ft) | |
| S. rhiannon | Weakley & Govus | | 2004 | Rhiannon's asterBuck Creek aster | G1 | Serpentine barrens 900–1,300 m (2,950–4,270 ft) | Buck Creek Serpentine Barrens, Clay County, North Carolina (US) |

###### Series Symphyotrichum

Series Symphyotrichum – four species :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) and varieties | NS | Habitat |
| S. anticostense | (Fernald) G.L.Nesom | Aster anticostensis | 1915 | Anticosti aster | G3 | Calcareous river shores, limestone lake shores 0–100 m (0–330 ft) |
| S. novi-belgii | (L.) G.L.Nesom | Aster novi-belgii | 1753 | New York aster Four varieties S. n. var. novi-belgii S. n. var. crenifolium S. n. var. elodes S. n. var. villicaule | G5 | Mostly sea or stream shores, thickets, dunes, barrens (depending on variety) 0–800 m (0–2,620 ft) |
| S. retroflexum | (Lindl.) G.L.Nesom | Aster retroflexus | 1836 | Rigid whitetop aster | G4 | Moist or dry wooded areas, moist meadows 400–1,500 m (1,310–4,920 ft) |
| S. robynsianum | (J.Rousseau) Brouillet & Labrecque | Aster robynsianus | 1957 | Robyn's aster | G5 | Moist, open, sandy, gravelly, or rocky habitats 10–400 m (30–1,310 ft) |

#### Subgenus Symphyotrichum named hybrids

Subgenus Symphyotrichum named hybrids – ten :
| Scientific name and picture | Author citation | Basionym | Year | Common name(s) | Parents | Habitat | Distribution |
| S. × finkii | (Rydb.) G.L.Nesom | Aster finkii | 1931 | | S. cordifolium × S. shortii | Wooded bluffs and fencerows | |
| S. × gravesii | (E.S.Burgess) G.L.Nesom | Aster gravesii | 1901 | Graves' aster | S. dumosum × S. laeve | Dry woods | |
| S. × longulum | (E.Sheld.) G.L.Nesom | Aster longulus | 1894 | | S. boreale × S. puniceum | Swampy and marshy areas | |
| S. × priceae | (Britton) G.L.Nesom | Aster priceae | 1901 | | S. kentuckiense × S. pilosum | | Kentucky |
| S. × salignum | (Willd.) G.L.Nesom | Aster salignus | 1803 | | S. lanceolatum var. lanceolatum × S. novi-belgii var. novi-belgii | | |
| S. × schistosum | (E.S.Steele) G.L.Nesom | Aster schistosus | 1911 | | S. cordifolium × S. laeve | Shale gravel, dry hills | |
| S. × subgeminatum | (Fernald) G.L.Nesom | Aster foliaceus var. subgeminatus | 1915 | | S. ciliolatum × S. novi-belgii var. novi-belgii | "Damp bushy ravine in the limestone tableland"200–300 m (660–980 ft) | |
| S. × tardiflorum | (L.) Greuter, M.V.Agab. & Wagenitz | Aster tardiflorus | 1763 | | S. cordifolium × S. puniceum | Along streams | |
| S. × versicolor | (Willd.) G.L.Nesom | Aster versicolor | 1803 | Late Michaelmas daisy | S. laeve var. laeve × S. novi-belgii var. novi-belgii | | |
| S. × woldenii | (Rydb.) G.L.Nesom | Aster woldenii | 1931 | | S. laeve × S. praealtum | | |