Dennstaedtiaceae
Creators: name: Triana-Moreno, Luz A.
name: Yañez, Agustina
name: Kuo, Li-Yaung
name: Rothfels, Carl J.
name: Pena, Nelson Túlio L.
name: Schwartsburd, Pedro B.
name: Sundue, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dennstaedtiaceae

description: Key to the genera of Dennstaedtiaceae
1. Sorus supplied by a single vein, marginal or abaxial……2
1. Sorus supplied by two or more veins, marginal…………8
2. Rhizome short-creeping or ascending, dictyostelic; petiole with two vascular bundles; sori exindusiate ....... .................................................... Monachosorum
2. Rhizome long-creeping, solenostelic; petiole with one vascular bundle; sori indusiate or exindusiate ............ 3
3. Abaxial indusium absent or minute and vestigial; spores monolete............................................................ 4
3. Abaxial indusium present; spores trilete ................... 5
4. Fiddlehead of developing leaf apex protected by reduced basal pinnules; axes armed, the spines curved, apically black when mature .......................................... Hiya
4. Fiddlehead of developing leaf apex not protected by reduced basal pinnules; axes armed or not, when present, the spines straight, green to stramineous ........ Hypolepis
5. Sori abaxial, submarginal (rarely marginal); indusia usually scarious; perispore morphology comprising of rodlets that are evenly distributed or forming a network…… Microlepia
5. Sori marginal; lower indusia similar in texture to the upper indusia; perispore morphology various, never rodlets .... 6
6. Epipetiolar buds absent; adaxial axes (rachis-costae) with raised wing, the wings decurrent onto the next order; petiole bases subterete, not clearly sulcate……… Mucura
6. Epipetiolar buds usually present; adaxial axes (rachis-costae) without raised wings; petiole adaxially sulcate, the groove confluent between orders ........................ 7
7. Rhizome branched regularly, ca. 0.5 cm diam.; leaves less than 1 m long, lacking leaf buds; glabrous or pubescent, hairs catenate, spreading, the apex often with a capitate terminal cell; plants with a north-temperate distribution...................................................... Sitobolium
7. Rhizome usually unbranched, thick, ca. 0.5 to 4 cm diam.; leaves often 1–2 m long, sometimes up to ca. 12 m, often with proliferous buds, hairs various, but lacking capitate terminal cells; plants primarily tropical in distribution.................................................... Dennstaedtia
8. Veins anastomosing; pinnae opposite or subopposite....9
8. Veins free; pinnae all or mostly alternate ................ 10
9. Laminae glabrous or somewhat scaly, often glaucous; rhizomes scaly; unfurling leaf protected by reduced basal pinnules............................................... Histiopteris
9. Laminae pubescent, green, not glaucous; rhizomes pubescent; unfurling leaf not protected by reduced basal pinnules................................................... Blotiella
10. Rachises flexuous; spores monolete .................. Paesia
10. Rachises straight; spores trilete ................... Pteridium
description: Published as part of Triana-Moreno, Luz A., Yañez, Agustina, Kuo, Li-Yaung, Rothfels, Carl J., Pena, Nelson Túlio L., Schwartsburd, Pedro B. & Sundue, Michael, 2023, Phylogenetic revision of Dennstaedtioideae (Dennstaedtiaceae: Polypodiales) with description of Mucura, gen. nov., pp. 20-46 in TAXON 72 (1) on page 31, DOI: 10.1002/tax.12858, http://zenodo.org/record/14047500