Draba incerta |
Draba ogilviensis |
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Yellowstone draba |
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Habit | Plants perennial, cespitose, often pulvinate, scapose; caudices many-branched, some terminated in sterile rosettes. | |
Stems | (1.5)4–14(21) cm; simple, pubescent with simple and 2–5-rayed or mostly subpectinate trichomes, sometimes glabrous distally. |
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Basal leaves | rosulate, narrowly oblanceolate to linear; (4)6–17(25) × (1)1.5–3.5(5) mm; margins entire, ciliate; midveins usually obscure; surfaces pubescent with short-stalked, pectinate trichomes; at least a few 4–6-rayed, adaxially sometimes glabrous. |
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Cauline leaves | absent or rarely 1, linear to oblong. |
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Inflorescences | 3–14(30)-flowered; rachises straight, glabrous or pubescent, fruiting pedicels ascending; straight; (2.5)4–11(27) mm. |
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Flowers | sepals ovate, 2.5–3.5(4) mm; petals oblanceolate to obovate, 4–6 × 1.5–2.5 mm, yellow fading to white; ovules 8–16(20) per ovary; styles 0.2–0.9 mm. |
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Fruits | broadly ovate to lanceolate, flattened, untwisted, 5–9(11) × 2–4 mm, glabrous or puberulent with simple and 2-rayed trichomes. |
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Seeds | oblong, flattened, 1.1–1.5 × 0.7–1 mm; wingless. |
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2n | =112. |
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Draba incerta |
Draba ogilviensis |
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Distribution | ||
Discussion | Rock outcrops, talus, gravelly areas. Flowering Jun–Aug. 2300–2500 m. BW. ID, NV, WA; north to AK, northeast to Northwest Territories, east to WY, southeast to CO, Quebec. Native. |
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Source | Flora of Oregon, volume 2, page 480 Ihsan Al-Shehbaz |
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Sibling taxa | ||
Synonyms | Draba incerta var. incerta | |
Web links |
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