Sedum paradisum subsp. subroseum B. L. Wilson & Zika 2018, subsp. nov.
Creators: name: Zika, Peter F.
name: Wilson, Barbara L.
name: Brainerd, Richard E.
name: Otting, Nick
name: Darington, Steven
name: Knaus, Brian J.
name: Nelson, Julie Kierstead
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Saxifragales
Crassulaceae
Sedum
Sedum paradisum
Sedum paradisum (denton 1978: 236) denton ex b. l. wilson subsp. subroseum b. l. wilson &amp; zika

description: 12b. Sedum paradisum (Denton 1978: 236) Denton ex B. L. Wilson subsp. subroseum B. L. Wilson & Zika, subsp. nov. Figs. 3C–D, 9F, 13D, 15D, 40A–F, 41.   
 Species nostra Sedum paradisum subsp. paradisum aemulans, differt axe inflorescentiae juvenili nutante, a Sedum obtusatum subsp. obtusatum floribus albis postea saepe pallide erubescentibus recedens.   
 Type: — UNITED STATES. California: Plumas County, dry serpentine ridgetop 1 air mile NE of Pilot Peak, 2005 m, 6 August 2011, P. F . Zika 25721 & L. P. Janeway, B. L. Wilson (holotype, WTU; isotypes, CAS, CHSC, OSC, UC).   
Rhizomes and stolons to 18 cm long, 1.7–5.1 mm diameter; sterile leafy shoots often numerous. Rosettes 13–55 mm diameter. Rosette leaves usually dense, in shady situations sometimes loosely arranged with visible internodes, slightly glaucous, at least when young, green, grey-green, orange to red, or purple, strongly flattened dorsiventrally, obovate to oblanceolate, cuneate, 10–31 × 6–16 mm, 2–3.5 mm thick, apices obtuse or notched, less commonly truncate or acute. Stem leaves ascending, slightly glaucous, at least when young, and colored like the rosette leaves, 9–20 × 3–11 mm, 1.5–3.5 mm thick, flattened, truncate at base, narrowly oblong, oblong-oblanceolate, or obovate to oblanceolate, apices acute or obtuse. Fertile stems pink to reddish or orange (green), 6–21 cm tall, nodding or bent in bud, usually erect in flower and fruit. Inflorescences 2.5–13 × (1–) 2–7 cm, narrowly cylindrical panicle-like cymes or flat-topped and corymbiform, subglobose if depauperate, with 4–10 branches, proximal branches ascending or spreading, 15–60 mm long, solitary at inflorescence nodes. Inflorescence bracts resembling stem leaves, but smaller, 2.5–18 × 1–8.5 mm, bases truncate, tips acute or blunt. Flowers (3–)10–49 per inflorescence, fresh flower diameter (5–) 7–12 mm, flowers 5-merous, erect, calyx green, pink or brown, 3.6–6.4 × 3.7–6.1 mm, sepals fused basally 0.8–2.2 mm, free sepal tips 2.3–4.9 mm long, apex narrowly acute, acute or obtuse. Fresh petals fused at base 1.4–3.3 mm; petals 6.5–10.1 mm long, 2.7–3.9 mm wide at mid-length, creamy-white, white, or greenish-white, base often dull light pink, midvein pink to red (especially in bud), apices or bases often pink or red, especially with age. Fresh petal blade v-shaped or trough-shaped in cross section, broad, distal half ovate or widely deltoid, at half its length slightly spreading circa 30° from floral axis, apex sometimes apiculate with subterminal mucro 0–0.2 mm. Stamens 10, when fresh shorter to longer than petals, filaments greenish-white or white, aging red, fresh anthers narrowly elliptic or oblong to elliptic-oblong, 1.2– 1.8 × 0.6–0.85 mm, yellow, aging white or less often gray, brown, orange, or blackish. Nectaries shallowly crescent-shaped, sunken in middle, white to dark yellow, 0.8–1.6 × 0.3–0.6 mm. Ovaries 4.0– 6.3 mm, erect, fused 0.5–1.4 mm, maturing into 5 dark brown erect follicles, 4.2–6.7 mm, with erect to slightly curved style remnant forming a narrow beak 0.6–1.3 mm, follicles fused 1.1–2.0 mm at base, containing 19–24 seeds. Seeds medium brown, oblanceolate, shiny, striate, 1.1–1.35 × 0.4–0.5 mm, including stipe 0.05–0.25 mm.  
 Paratypes:— UNITED STATES. CALIFORNIA. Butte County: below Pilot Peak, on Quincy-Laporte Road, 1930 m, 6 August 2011, Wilson 16817 & Janeway, Zika (OSC, WTU). Plumas County: near La Porte, 915 m, 29 June 1968, Ahart s.n. (CAS); N side of Pilot Peak, 20 September 2011, Ahart 17693 (WTU); Plumas-Eureka State Park, 1592 m, 28 May 1961, Uhl 962 (BH); Eureka Peak, 1695 m, 31 July 1964, Clausen 641125 (BH); W of Eureka State Park, 1660 m, 13 June 1976, Denton 3878 (OSC, WTU); SSW of Graeagle, 1830 m, 14 June 1976, Denton 3884 (WTU); Bucks Lake, summer 1975, Griggs 310 (CAS); Lakes Basin area, 1980 m, 11 August 1950, Weatherby 1510 (RSA); Little Jamison Creek, 1600 m, 27 July 1964, Clausen 641107 (BH), Clausen 641108 (BH), Clausen 641110 (BH), Clausen 641111 (BH), Clausen 641114 (BH); Jamison Creek, 1700 m, 6 August 2011, Wilson, Janeway & Zika CWG-14 (DAV, JEPS, RENO, RSA, WTU); Quincy-Laporte Road, 1930 m, 6 August 2011, Wilson, Zika & Janeway CWG-15 (HSC, US); WNW of Mills Peak, 1885 m, 28 June 2013, Zika 26283 (DAV, HSC, JEPS, UCR). Sierra County: NE of Gold Lake, 1990 m, 29 July 1964, Clausen 641120 (BH, GH); Sierra Buttes, 29 July 1964, Clausen 641127 (BH, GH), 641115 (BH, GH), 641116 (BH); same site, 14 June 1976, Denton 3899 (OSC, WTU); E of La Porte, 1700 m, 28 July 1982, Ahart 3700 (CAS); Packer Lake, 1940 m, 28 June 2013, Zika 26279 (CAS, CHSC, RSA, SD).   
 Distribution and ecology: —Restricted to the Northern High Sierra Nevada ecoregion (Jepson eFlora 2017), California, north of the Middle Yuba River, at elevations of 915–2005 m (Fig. 37). Habitats included rocky slopes, ridgelines, and dry cliffs, in full sun to partial shade, on a variety of bedrock types including peridotite, andesite, and granite. Common associates included: Abies magnifica A. Murray bis, Aconogonon phytolaccifolium (Meisn. ex Small) Rydb., Calochortus leichtlinii Hook. f., Cryptogramma acrostichoides R. Br., Eriogonum umbellatum var. nevadense Gand., E. ursinum S. Watson var. ursinum, Myriopteris gracillima, Pellaea bridgesii Hook., Penstemon deustus, P. newberryi A. Gray, Pinus contorta Douglas ex Loudon, P. jeffreyi Balf., P. lambertiana Douglas, Poa secunda J. Presl, Silene bernardina S. Watson, and Spiraea splendens É.N. Baumann ex K. Koch.   
 Etymology: — Sedum paradisum subsp. subroseum, or Plumas stonecrop, was named for its flowers, which usually turned pinkish and with age gave the entire inflorescence a rosy appearance.   
 Notes: — Sedum paradisum subsp. subroseum (Figs. 40A–F, 41) differed from S. paradisum subsp. paradisum in its bent young inflorescence axis, slightly shorter sepals, more strongly red-tinted foliage, and its more eastern distribution in the Sierra Nevada range.   
 Sedum paradisum subsp. subroseum was separable from S. obtusatum in the Sierra Nevada by flower color; petals of S. paradisum subsp. subroseum were white while those of S. obtusatum were pale yellow to deep yellow. The two were allopatric. The southernmost known station of S. paradisum subsp. subroseum was at Sierra Butte, north of the Middle Yuba River, and the northernmost known station of S. obtusatum was near Jackson Meadows Reservoir, 11 km distant and south of the Middle Yuba River.
description: Published as part of Zika, Peter F., Wilson, Barbara L., Brainerd, Richard E., Otting, Nick, Darington, Steven, Knaus, Brian J. & Nelson, Julie Kierstead, 2018, A review of Sedum section Gormania (Crassulaceae) in western North America, pp. 448-450 in Phytotaxa 368 (1) on pages 448-450, DOI: 10.11646/phytotaxa.368.1.1, http://zenodo.org/record/13704629