Draba carnosula |
Draba cyclomorpha |
|
---|---|---|
Mount Eddy Draba, Mt. Eddy Draba |
granite Draba, Lemmon's Draba |
|
Habit | Perennials; (loosely cespitose); caudex branched (somewhat surculose, with persistent leaf bases, branches sometimes terminating in sterile rosettes); scapose. | Perennials; (cespitose, not pulvinate); caudex branched (with persistent petiole remains, branches sometimes terminating in sterile rosettes); scapose. |
Stems | unbranched, 0.3–1.2 dm, glabrous throughout. |
unbranched, 0.1–0.6(–1) dm, (thinly) pilose throughout, trichomes simple and stalked, 2- (or 3-)rayed, (often crisped), 0.1–0.8 mm. |
Basal leaves | rosulate; petiolate; petiole (persistent, midvein prominent), ciliate, (trichomes sparse, short-stalked, 2–4-rayed, sometimes with simple ones, 0.2–0.5 mm); blade (somewhat fleshy), oblanceolate or spatulate to obovate, 0.3–1.5 cm × 1.5–5 mm, margins entire, (pubescent as petiole), surfaces glabrous. |
rosulate; shortly petiolate; petiole base and margin ciliate, (trichomes simple, 0.2–1 mm); blade (somewhat fleshy), oblanceolate to obovate, 0.4–1 cm × 2–5 mm, margins entire, surfaces glabrous or hirsute, abaxially usually with stalked, 2-rayed trichomes, 0.1–0.6 mm, rarely with fewer, simple ones, (midvein obscure), adaxially with almost exclusively simple trichomes, to 0.6 mm. |
Cauline leaves | 0. |
0. |
Racemes | 2–6-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. |
5–14(–20)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. |
Flowers | sepals ovate, 3–4 mm, glabrous; petals yellow, oblanceolate, 5–7 × 1.3–2 mm; anthers oblong, 0.7–0.9 mm. |
sepals ovate, 1.5–2.2 mm, pubescent, (trichomes simple and short-stalked, 2-rayed); petals yellow, spatulate, 4–5.5 × 1.5–2.5 mm; anthers oblong, 0.6–0.7 mm. |
Fruiting pedicels | divaricate-ascending, straight, 3–8 mm, usually glabrous, rarely trichomes simple. |
horizontal to divaricate-ascending, often curved upward or straight, 3–8(–10) mm, pilose as stem. |
Fruits | lanceolate to elliptic-lanceolate, plane, strongly flattened, 10–23 × 4–6 mm; valves (each with distinct midvein), glabrous; ovules 8–12 per ovary; style 2–3 mm. |
oblong to oblong-ovate, plane, flattened, 3.5–9 × 2.5–4 mm; valves glabrous; ovules 8–12 per ovary; style 0.3–1 mm. |
Seeds | (broadly winged), orbicular, 3–4.5 in diam.; (wing 1–1.5 mm wide). |
ovoid, 1.4–1.9 × 1–1.2 mm. |
Draba carnosula |
Draba cyclomorpha |
|
Phenology | Flowering Jun–Jul. | Flowering Jul–Aug. |
Habitat | Open rocky hillsides | Basaltic talus, stony ridges |
Elevation | 2800-3100 m (9200-10200 ft) | 2500-3100 m (8200-10200 ft) |
Distribution |
CA |
OR |
Discussion | Of conservation concern. Although Draba carnosula was reduced by Hitchcock to a variety of D. howellii, it differs significantly by having leafless flowering stems, 2–6-flowered racemes, and broadly winged seeds 3–4.5 mm in diam. Draba howellii almost always has 1–3-leaved stems, (5–)7–18(–25)-flowered racemes, and not winged, distally appendaged seeds 1–1.6 mm in diam. Draba carnosula is known only from a few collections from Mount Eddy in Trinity County and the north side of Mount Shasta in Siskiyou County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Draba cyclomorpha was treated by Schulz, C. L. Hitchcock (1941), and R. C. Rollins (1993) as a variety of D. lemmonii. The two taxa are quite distinct morphologically and separated by nearly 1600 kilometers, justifying their treatment as distinct species (I. A. Al-Shehbaz and M. D. Windham 2007). Draba cyclomorpha is known to us only from the Wallowa Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 299. | FNA vol. 7, p. 305. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | D. howellii var. carnosula | D. lemmonii var. cyclomorpha |
Name authority | O. E. Schulz: in H. G. A. Engler, Pflanzenr. 89[IV,105]: 82. (1927) | Payson: Amer. J. Bot. 4: 263. (1917) |
Web links |
|