|
twisted Draba
|
Smith's Draba
|
| Biennials; not scapose. |
Perennials; (matted); caudex branched (with persistent leaf remains, branches slender, prostrate, sometimes terminating in sterile rosettes); not scapose. |
usually branched, rarely unbranched, (0.3–)0.6–3(–4) dm, densely pubescent proximally, trichomes simple, 0.4–1.3 mm, with fewer 2–4-rayed ones, to 0.3 mm, (distally with mostly branched trichomes, with fewer, simple ones). |
usually unbranched, (0.5–)1–2.4(–3) dm, pubescent throughout, trichomes short-stalked, subdendritic, 4–12-rayed, 0.05–0.2 mm. |
rosulate; petiolate; petiole base and margin ciliate, (trichomes simple, 0.2–0.7 mm); blade lanceolate or oblanceolate to spatulate, 0.5–2.9 cm × 1–5(–9) mm, margins dentate, surfaces pubescent, abaxially with stalked, cruciform, or 2- or 3-rayed trichomes, 0.1–0.4 mm, (rarely with a branched ray), adaxially with simple trichomes, 0.1–0.7 mm, and stalked, 2–4-rayed ones. |
rosulate; petiole (obscure), usually not ciliate, rarely pubescent proximally, (trichomes simple or spurred, to 0.25 mm); blade obovate to narrowly oblanceolate, 0.5–1.3(–2.5) cm × (1–)2–4(–7) mm, margins usually entire, rarely denticulate, surfaces pubescent with short-stalked, subdendritic, 5–12-rayed trichomes, 0.05–0.3 mm. |
(15–)22–54(–76), (densely imbricate at least basally); sessile; blade ovate to oblong or lanceolate (base often densely bearded abaxially, trichomes simple, to 1.3 mm), margins dentate, surfaces pubescent as basal. |
(2 or) 3–8; sessile; blade oblong to lanceolate, margins usually entire, rarely denticulate, surfaces pubescent as basal, or, rarely, adaxially with long-stalked, 2–5-rayed trichomes. |
(11–)17–36(–48)-flowered, bracteate basally, elongated or not in fruit; rachis not flexuous, pubescent as stems distally. |
12–28-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. |
sepals ovate, 2–2.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed); petals white, spatulate, 3.5–4.5 × 1–2 mm; anthers ovate, 0.3–0.4 mm. |
sepals ovate, 2–2.5 mm, pubescent; petals white, spatulate, 4–6 × 2–3 mm; anthers ovate, 0.5–0.6 mm. |
erect to ascending, (subappressed to rachis), straight, (1.5–)2.5–6(–13) mm, pubescent, trichomes 2–4-rayed and simple. |
divaricate, straight, (3–)5–10(–13) mm, pubescent as stem. |
oblong to linear-lanceolate or elliptic, slightly twisted or plane, flattened, 5–10(–12) × 1.5–2.5(–3) mm; valves glabrous or pubescent, trichomes simple and short-stalked, 2–4-rayed, 0.05–0.3 mm; ovules (24–)30–40 per ovary; style 0.01–0.25 mm. |
ovate-lanceolate, twisted, flattened, 5–9 × 2–3 mm; valves pubescent, trichomes simple and short-stalked, 2–4-rayed, 0.05–0.2 mm; ovules 16–20 per ovary; style (0.7–)1–2(–2.3) mm. |
oblong, 0.7–1.1 × 0.5–0.6 mm. |
oblong, 0.8–1.2 × 0.5–0.7 mm. |
= 32. |
= 32. |
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| Flowering Jul–Aug. |
Flowering May–Jul. |
| Rock outcrops, talus, gravelly shores |
Igneous outcrops and rocky slopes in mixed conifer, mountain shrub, and (rarely) sagebrush communities |
| 0-200 m (0-700 ft) |
2300-3700 m (7500-12100 ft) |
|
MI; MN; MB; NB; NL; ON; PE; QC; Greenland; n Europe; c Europe (Russia) |
CO |
|
Of conservation concern. Draba smithii is a distinctive species known only from Archuleta, Las Animas, and Mineral counties in southern Colorado. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 7, p. 312. |
FNA vol. 7, p. 338. |
| Brassicaceae > tribe Arabideae > Draba |
Brassicaceae > tribe Arabideae > Draba |
D. abajoensis, D. albertina, D. aleutica, D. alpina, D. aprica, D. arabisans, D. arctica, D. arctogena, D. argyrea, D. arida, D. asprella, D. asterophora, D. aurea, D. aureola, D. bifurcata, D. borealis, D. brachycarpa, D. brachystylis, D. breweri, D. burkei, D. californica, D. cana, D. carnosula, D. chamissonis, D. cinerea, D. corrugata, D. corymbosa, D. crassa, D. crassifolia, D. cruciata, D. cuneifolia, D. cusickii, D. cyclomorpha, D. daviesiae, D. densifolia, D. exunguiculata, D. fladnizensis, D. glabella, D. globosa, D. graminea, D. grandis, D. grayana, D. heilii, D. helleriana, D. hitchcockii, D. howellii, D. incerta, D. incrassata, D. inexpectata, D. jaegeri, D. juvenilis, D. kassii, D. kluanei, D. lactea, D. lemmonii, D. lonchocarpa, D. longisquamosa, D. macounii, D. maguirei, D. malpighiacea, D. micropetala, D. mogollonica, D. monoensis, D. mulliganii, D. murrayi, D. nemorosa, D. nivalis, D. norvegica, D. novolympica, D. oblongata, D. ogilviensis, D. oligosperma, D. oreibata, D. oxycarpa, D. palanderiana, D. pauciflora, D. paucifructa, D. paysonii, D. pectinipila, D. pedicellata, D. pennellii, D. petrophila, D. pilosa, D. platycarpa, D. porsildii, D. praealta, D. pterosperma, D. ramosissima, D. ramulosa, D. rectifructa, D. reptans, D. ruaxes, D. santaquinensis, D. saxosa, D. scotteri, D. serpentina, D. sharsmithii, D. sibirica, D. sierrae, D. simmonsii, D. smithii, D. sobolifera, D. spectabilis, D. sphaerocarpa, D. sphaeroides, D. standleyi, D. stenoloba, D. stenopetala, D. streptobrachia, D. streptocarpa, D. subalpina, D. subcapitata, D. subumbellata, D. trichocarpa, D. ventosa, D. verna, D. viridis, D. weberi, D. yukonensis, D. zionensis |
D. abajoensis, D. albertina, D. aleutica, D. alpina, D. aprica, D. arabisans, D. arctica, D. arctogena, D. argyrea, D. arida, D. asprella, D. asterophora, D. aurea, D. aureola, D. bifurcata, D. borealis, D. brachycarpa, D. brachystylis, D. breweri, D. burkei, D. californica, D. cana, D. carnosula, D. chamissonis, D. cinerea, D. corrugata, D. corymbosa, D. crassa, D. crassifolia, D. cruciata, D. cuneifolia, D. cusickii, D. cyclomorpha, D. daviesiae, D. densifolia, D. exunguiculata, D. fladnizensis, D. glabella, D. globosa, D. graminea, D. grandis, D. grayana, D. heilii, D. helleriana, D. hitchcockii, D. howellii, D. incana, D. incerta, D. incrassata, D. inexpectata, D. jaegeri, D. juvenilis, D. kassii, D. kluanei, D. lactea, D. lemmonii, D. lonchocarpa, D. longisquamosa, D. macounii, D. maguirei, D. malpighiacea, D. micropetala, D. mogollonica, D. monoensis, D. mulliganii, D. murrayi, D. nemorosa, D. nivalis, D. norvegica, D. novolympica, D. oblongata, D. ogilviensis, D. oligosperma, D. oreibata, D. oxycarpa, D. palanderiana, D. pauciflora, D. paucifructa, D. paysonii, D. pectinipila, D. pedicellata, D. pennellii, D. petrophila, D. pilosa, D. platycarpa, D. porsildii, D. praealta, D. pterosperma, D. ramosissima, D. ramulosa, D. rectifructa, D. reptans, D. ruaxes, D. santaquinensis, D. saxosa, D. scotteri, D. serpentina, D. sharsmithii, D. sibirica, D. sierrae, D. simmonsii, D. sobolifera, D. spectabilis, D. sphaerocarpa, D. sphaeroides, D. standleyi, D. stenoloba, D. stenopetala, D. streptobrachia, D. streptocarpa, D. subalpina, D. subcapitata, D. subumbellata, D. trichocarpa, D. ventosa, D. verna, D. viridis, D. weberi, D. yukonensis, D. zionensis |
| D. confusa, D. contorta, D. incana subsp. confusa, D. incana var. confusa, D. incana var. contorta |
|
| Linnaeus: Sp. Pl. 2: 643. (1753) |
Gilg & O. E. Schulz: in H. G. A. Engler, Pflanzenr. 89[IV,105]: 177. (1927) |
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