Draba heilii |
Draba inexpectata |
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Habit | Perennials; (densely cespitose); caudex few-branched (compact, with persistent, thickened leaves); not scapose. | Perennials; (cespitose); caudex simple or branched (with persistent leaf remains); not scapose. |
Stems | unbranched or branched distally, 0.3–0.7 dm, glabrous throughout or, rarely, pilose, trichomes simple and stalked, 2-rayed, 0.2–0.5 mm. |
unbranched, 0.1–0.4 dm, pubescent, trichomes 5–10-rayed, 0.05–0.2 mm, and fewer, simple and 2-rayed ones, 0.3–0.6 mm. |
Basal leaves | (persistent, imbricate); rosulate; undifferentiated into blade and petiole (becoming indurate at base); blade linear-lanceolate, 0.5–0.8 cm × 1–1.5(–2) mm, margins entire, surfaces glabrous or, rarely, pilose with simple and stalked, 2-rayed trichomes, (margins ciliate with simple and, rarely, 2-rayed setiform trichomes, 0.5–1.3 mm, midvein prominent). |
rosulate; subsessile; petiole ciliate; blade obovate to oblanceolate, 0.2–0.4 cm × 0.7–1.5 mm, (base sparsely ciliate, trichomes simple and 2-rayed, 0.4–0.6 mm), margins entire, surfaces densely pubescent with subsessile, 6–12-rayed, stellate trichomes, 0.25–0.7 mm. |
Cauline leaves | 6–8; sessile; blade linear-oblong, 0.5–0.8 cm × 1–2 mm (widest about base), margins entire, (ciliate). |
1–3 (or 4); sessile; blade ovate to lanceolate, margins entire or denticulate, surfaces pubescent as basal. |
Racemes | 10–26-flowered, ebracteate, elongated in fruit; rachis not flexuous, usually glabrous, rarely pubescent, (trichomes non-crisped, simple and 2-rayed). |
2–5(–8)-flowered, proximalmost 1–3 flowers bracteate, slightly elongated in fruit; rachis not flexuous, pubescent, trichomes 5–10-rayed. |
Flowers | sepals ovate, 1.7–2.7 mm, usually glabrous, rarely pilose, (trichomes simple); petals yellow, oblong-oblanceolate, 4–6 × 1.5–2 mm; anthers oblong, 0.5–0.6 mm. |
sepals (sometimes persistent), ovate, 1.2–1.7 mm, pubescent, (trichomes simple and branched); petals white, obovate, 2–2.5 × 1–1.2 mm; anthers ovate, 0.1–0.2 mm. |
Fruiting pedicels | ascending, straight, 3–5(–7) mm, usually glabrous, rarely pilose, (trichomes simple and 2-rayed, stalked). |
ascending, straight, 0.7–2(–3) mm, pubescent as rachis. |
Fruits | narrowly lanceolate, twisted 1/2 turn or plane, flattened, 7–10 × 1.3–1.6 mm; valves glabrous; ovules 16–20 per ovary; style 0.7–1.3 mm. |
elliptic to lanceolate, slightly twisted or plane, flattened, 3.5–5 × 1.5–2 mm; valves pubescent, trichomes short-stalked, (3 or) 4(–6)-rayed, 0.1–0.2 mm; ovules 16–24 per ovary; style 0.2–0.4 mm. |
Seeds | ovoid, 1 × 0.6 mm. |
oblong, 0.7–1 × 0.4–0.5 mm. |
Draba heilii |
Draba inexpectata |
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Phenology | Flowering Jun–Jul. | Flowering Jul–Aug. |
Habitat | Alpine tundra | Rocky ridges and slopes, on accumulated soil among boulders, subalpine fir and juniper communities |
Elevation | ca. 3700 m (ca. 12100 ft) | 3100-3700 m (10200-12100 ft) |
Distribution |
NM |
UT |
Discussion | Draba heilii is restricted to Mora and Rio Arriba counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Draba inexpectata is known from the Uinta Mountains in Summit County. The measurements above are based on the holotype (Franklin 6328) and two of the three paratypes (Franklin 6293, 6331), all at BRY. One paratype (Goodrich 26166, BRY) is a robust, completely sterile plant of uncertain identity and was not used for the description above. Although compared in the original description with Draba lonchocarpa (with which it grows sympatrically), D. inexpectata appears most closely related to D. cana. Draba inexpectata is distinguished from the latter by having stems 1–4 cm, basal leaves non-ciliate, racemes that are 2–5(–8)-flowered and scarcely elongated in fruit, fruits elliptic to lanceolate, 3.5–5 mm, and ovules 16–24 per ovary. By contrast, D. cana has stems (6–)10–30 cm, basal leaves ciliate at the apex, racemes that are (10–)15–47(–63)-flowered and often considerably elongated in fruit, fruits linear-lanceolate or very rarely ovate-oblong, (5–)6–11 mm, and ovules 28–48 per ovary. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 311. | FNA vol. 7, p. 313. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Al-Shehbaz: Harvard Pap. Bot. 14: 83, fig. 1. (2009) | S. L. Welsh: in S. L. Welsh et al., Utah Fl. ed. 3, 272. (2003) |
Web links |