Flora of North America species comparison

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Draba daviesiae

Draba kassii

bitter root Draba

kass' Draba
Habit Perennials; (densely pulvinate); caudex branched (branches elongated, loose, with persistent leaf remains, terminating in flowering or sterile shoots); scapose. Perennials; caudex branched (densely covered with persistent petiole remains, branches sometimes terminating in sterile rosettes); scapose.
Stems

unbranched, (0.05–)0.2–0.6 dm, glabrous.

unbranched, 0.5–1.8 dm, glabrous.
Basal leaves

(densely imbricate); rosulate;

petiolate;

petiole ciliate throughout;

blade (fleshy), oblong to obovate or oblanceolate, 0.3–0.7(–1) cm × 1–2(–2.5) mm, margins entire, (ciliate, trichomes simple, 0.1–0.5 mm, apex obtuse), surfaces glabrous (midvein obscure abaxially).

rosulate; long-petiolate;

petiole ciliate throughout;

blade oblanceolate to linear-oblanceolate, 1.5–5.5 cm × (1.5–)2–5.5 mm, margins entire (ciliate, trichomes simple, 0.2–1 mm), surfaces abaxially sparsely pubescent with short-stalked, submalpighiaceous trichomes, 0.3–1.3 mm, sometimes with 3- or 4-rayed ones, adaxially usually glabrous, rarely sparsely pubescent.
Cauline leaves

0.

0.
Racemes

2–8(–10)-flowered, ebracteate, (subcorymbose), slightly elongated in fruit;

rachis not flexuous, glabrous.

3–8(–10)-flowered, ebracteate, considerably elongated in fruit;

rachis not flexuous, glabrous.
Flowers

sepals oblong, 1.5–2.2 mm, glabrous;

petals pale to bright yellow, spatulate, 3.5–4 × 1–2 mm;

anthers ovate, 0.3–0.4 mm.

sepals broadly ovate, 2–3 mm, subapically sparsely pubescent, (trichomes simple);

petals yellow, oblanceolate, 4.5–7 × 1.2–2 mm;

anthers ovate, 0.4–0.5 mm.
Fruiting pedicels

divaricate-ascending (not decurrent basally), straight, 4–10 mm, glabrous.

ascending to divaricate-ascending, straight, 5–14(–17) mm, glabrous.
Fruits

ovate to oblong-elliptic, plane, flattened, 4–8 × 2–4 mm;

valves (obscurely veined), glabrous;

ovules 6–14 per ovary;

style 0.1–0.5 mm.

elliptic to oblong-elliptic, plane, flattened, 3–10(–14) × 2–3 mm;

valves glabrous;

ovules 20–28 per ovary;

style 0.6–1 mm.
Seeds

ovoid, 1.2–1.5 × 0.8–1 mm.

oblong, 1.2–1.4 × 0.7–0.8 mm.
2n

= 22.

Draba daviesiae

Draba kassii
Phenology Flowering Jul–Aug. Flowering Apr–Jun.
Habitat Talus slopes, rock crevices and cracks, rocky ridges and slides, alpine meadows Quartzite and granitic outcrops
Elevation 2700-2900 m (8900-9500 ft) 2100-2600 m (6900-8500 ft)
Distribution
from FNA
MT
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

Although originally described as a variety of Draba apiculata (= D. globosa), D. daviesiae is distinct morphologically. It is easily distinguished from the former by its densely pulvinate habit, obtuse leaf blades, and obscurely veined fruit valves. By contrast, D. globosa exhibits a cespitose but non-pulvinate habit, acute leaf blades, and prominently veined fruit valves. Draba daviesiae is known from the Bitterroot Mountains in Ravalli County.

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

Of conservation concern.

Draba kassii is a distinctive species that is known from the Deep Creek Mountains in Juab and Tooele counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 305. FNA vol. 7, p. 315.
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. 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
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. 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. apiculata var. daviesiae, D. densifolia var. daviesiae
Name authority (C. L. Hitchcock) Rollins: Contr. Gray Herb. 214: 5. (1984) S. L. Welsh: Great Basin Naturalist 46: 264. (1986)
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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