Flora of North America species comparison

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Draba murrayi

Draba simmonsii

kathul mountain Draba
Habit Perennials; (cespitose); caudex often branched (covered with persistent leaves or leaf remains, branches sometimes terminating in sterile rosettes); not scapose. Perennials; caudex branched (with persistent leaf bases and petioles); 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.

unbranched, (0.15–)0.3–1.1(–1.3) dm, often pubescent throughout, sometimes sparsely pubescent distally, trichomes stalked, 2–4-rayed, and fewer, simple ones, 0.1–0.3(–0.6) 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 imbricate); rosulate;

petiolate;

petiole (base somewhat thickened), margin ciliate, (trichomes simple, 0.5–1 mm);

blade oblong to oblong-lanceolate, 0.5–1.6 cm × 2–5 mm, margins entire (apex subacute to obtuse), surfaces pubescent throughout or glabrous adaxially, with simple and stalked, 2–4(–6)-rayed, stellate to subdendritic trichomes.
Cauline leaves

1–6;

sessile;

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

0.
Racemes

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

rachis not flexuous, glabrous.

(2–)4–10(–14)-flowered, ebracteate, slightly elongated in fruit;

rachis not flexuous (straight), 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.

sepals (purplish green), oblong, (2.5–)2.8–3.5(–3.8) mm, pubescent, (trichomes simple and sometimes short-stalked, 2-rayed);

petals pale yellow, narrowly obovate, (sides non-parallel), (3.5–)3.8–5.5(–5.8) × (2.5–)2.8–4(–4.6) mm, (emarginate);

anthers ovate, ca. 0.5 mm.
Fruiting pedicels

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

divaricate, straight, 2.5–10 mm, pubescent as stem.
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.

lanceolate, plane, slightly flattened, 5.5–9(–11) × 2.3–3.8 mm;

valves pubescent, trichomes simple, sometimes with fewer, 2-rayed ones, 0.1–0.3 mm;

ovules 16–24(–28) per ovary;

style 0.1–0.3 mm (stigma as wide as style).
Seeds

oblong, 0.9–1.2 × ca. 0.5 mm.

(dark brown), oblong-ovate, 1–1.3 × 0.7–0.8 mm.
2n

= 48.

Draba murrayi

Draba simmonsii
Phenology Flowering Jun–Jul. Flowering late Jun–Jul.
Habitat Rock outcrops and talus, open forests, dry slopes, alluvial gravels Dry open ground, open patches in meadows or heath vegetation, outwash plains
Elevation 150-900 m (500-3000 ft) 0-100 m (0-300 ft)
Distribution
from FNA
AK; YT
[BONAP county map]
from FNA
NT; NU
[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. 337.
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. 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. 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. alpina var. gracilescens
Name authority G. A. Mulligan: Canad. J. Bot. 57: 1874. (1979) Elven & Al-Shehbaz: Novon 18: 326. (2008)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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