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kathul mountain Draba

hairy Draba, openground Draba

Habit Perennials; (cespitose); caudex often branched (covered with persistent leaves or leaf remains, branches sometimes terminating in sterile rosettes); not scapose. Annuals; not scapose.
Stems

unbranched, (0.4–)0.9–2.7(–3.5) dm, pubescent proximally, glabrous distally, trichomes simple, 0.2–1 mm, and often smaller, fewer short-stalked, 2–4-rayed ones.

usually branched distally, (0.3–)0.7–3(–3.6) dm, pubescent throughout, trichomes short-stalked to subsessile, cruciform, 0.1–0.5 mm.

Basal leaves

rosulate;

petiolate;

petiole (0–0.7 cm), margin ciliate;

blade oblanceolate to obovate, (0.3–)0.6–2.1(–2.8) cm × (1.5–)2.5–5(–9) mm, margins entire or sparsely denticulate, (ciliate, trichomes simple, 0.2–1.1 mm), surfaces pubescent with stalked, cruciform, and 2- or 3-rayed trichomes, (rays sometimes spurred), 0.1–0.6 mm, sometimes mostly simple trichomes adaxially.

not rosulate;

petiolate;

petiole (to 1 cm), ciliate throughout;

blade obovate to spatulate or ovate to suborbicular, 0.6–2.5 cm × 3–10 mm, margins usually entire, rarely toothed, surfaces pubescent with stalked, cruciform trichomes, 0.1–0.5 mm.

Cauline leaves

1–6;

sessile;

blade ovate or oblong to lanceolate, margins usually entire, rarely sparsely denticulate, surfaces pubescent as basal.

(5–)8–20(–25);

sessile;

blade oblong to lanceolate, margins entire, (not ciliate), surfaces pubescent as basal.

Racemes

7–25-flowered, ebracteate, elongated in fruit;

rachis not flexuous, glabrous.

7–46-flowered, ebracteate, elongated in fruit, (lateral racemes from axils of distalmost leaves subumbellate);

rachis not flexuous, pubescent as stem.

Flowers

sepals ovate, 1.5–2.2 mm, pubescent, (trichomes simple and short-stalked, 2-rayed);

petals white, obovate, 4–6 × 1.5–2.5 mm;

anthers ovate, 0.4–0.5 mm.

(late ones cleistogamous, apetalous);

sepals oblong, 0.6–1.2 mm, pubescent;

petals white, spatulate, 1.3–2.5 × 0.5–1 mm;

anthers ovate, 0.1–0.2(–0.05 in cleistogamous flowers) mm.

Fruiting pedicels

divaricate-ascending, usually straight, rarely curved, (4–)7–18 mm, glabrous.

horizontal to divaricate-ascending, straight, 2–5 mm, pubescent, trichomes subsessile, 4-rayed.

Fruits

linear-lanceolate to narrowly elliptic, plane, flattened, 5–13 × 1.5–2 mm;

valves glabrous;

ovules 20–30 per ovary;

style 0.6–1.5 mm.

linear-ellipsoid to ellipsoid, plane, flattened, (3–)4–6 × 0.8–1.1 mm;

valves pubescent, trichomes subsessile, (2–)4-rayed, 0.03–0.12 mm;

ovules 4–6(–8) per ovary;

style 0.07–0.13 mm.

Seeds

oblong, 0.9–1.2 × ca. 0.5 mm.

ovoid, 0.9–1.1 × 0.5–0.6 mm.

2n

= 48.

Draba murrayi

Draba aprica

Phenology Flowering Jun–Jul. Flowering Mar–May.
Habitat Rock outcrops and talus, open forests, dry slopes, alluvial gravels Open knolls, rocky roadsides, rock outcrops, igneous glades, woods, alluvial areas near streams
Elevation 150-900 m (500-3000 ft) 100-400 m (300-1300 ft)
Distribution
from FNA
AK; YT
[BONAP county map]
from FNA
AR; GA; MO; OK; SC
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 321. FNA vol. 7, p. 290.
Parent taxa Brassicaceae > tribe Arabideae > Draba Brassicaceae > tribe Arabideae > Draba
Sibling taxa
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. 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. 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. 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
Synonyms D. brachycarpa var. fastigiata
Name authority G. A. Mulligan: Canad. J. Bot. 57: 1874. (1979) Beadle: in J. K. Small, Fl. S.E. U.S. ed. 2, 1336, 1375. (1913)
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