FNA: Draba heilii vs. Draba asterophora

	Draba heilii	Draba asterophora
		Lake Tahoe Draba, Tahoe Draba
Habit	Perennials; (densely cespitose); caudex few-branched (compact, with persistent, thickened leaves); not scapose.	Perennials; (loosely cespitose); caudex branched (somewhat surculose, with persistent leaf bases, branches sometimes terminating in sterile rosettes); 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, 0.3–1.1 dm, glabrous throughout or sparsely pubescent proximally, trichomes (2–)4-rayed, 0.1–0.3 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; petiolate; petiole obsolete, margin rarely ciliate proximally; blade (somewhat fleshy), broadly obovate to suborbicular or spatulate, 0.4–1.4(–1.7) cm × (2–)3–6(–7) mm, margins entire, surfaces pubescent, trichomes stalked, cruciform, and 2-, 3-, or 5-rayed, 0.2–0.6 mm.
Cauline leaves	6–8; sessile; blade linear-oblong, 0.5–0.8 cm × 1–2 mm (widest about base), margins entire, (ciliate).	0 (or 1, as a bract).
Racemes	10–26-flowered, ebracteate, elongated in fruit; rachis not flexuous, usually glabrous, rarely pubescent, (trichomes non-crisped, simple and 2-rayed).	(5–)8–20(–27)-flowered, usually ebracteate, rarely proximalmost flowers bracteate, elongated in fruit; rachis not flexuous, glabrous.
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 oblong, 3–4 mm, glabrous or sparsely pubescent, (trichomes subapical, short-stalked, 2–4-rayed); petals bright yellow, oblanceolate, 5–7 × 1.5–2.5 mm; anthers ovate, 0.5–0.6 mm.
Fruiting pedicels	ascending, straight, 3–5(–7) mm, usually glabrous, rarely pilose, (trichomes simple and 2-rayed, stalked).	horizontal to divaricate-ascending, straight or curved upward, 3–9 mm, glabrous.
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.	lanceolate-ovate to broadly ovate or oblong, slightly twisted or plane, strongly flattened, 5–11(–14) × (3.5–)4–6 mm; valves glabrous or, rarely, puberulent, trichomes simple and short-stalked, 2- or 3-rayed, 0.05–0.3 mm; ovules 12–18 per ovary; style 0.2–1.6(–2) mm.
Seeds	ovoid, 1 × 0.6 mm.	(winged), ovate, 1.8–2.8 × 1.2–2 mm; (wing 0.5–1 mm wide).
2n		= 40.

	Draba heilii	Draba asterophora
Phenology	Flowering Jun–Jul.	Flowering Jun–Aug.
Habitat	Alpine tundra	Granitic rock outcrops, talus, gravelly soil
Elevation	ca. 3700 m (ca. 12100 ft)	2600-3300 m (8500-10800 ft)
Distribution	NM [BONAP county map]	CA; NV [BONAP county map]
Discussion	Draba heilii is restricted to Mora and Rio Arriba counties. (Discussion copyrighted by Flora of North America; reprinted with permission.)	C. L. Hitchcock (1941) and R. C. Rollins (1993) divided Draba asterophora into two varieties based on minor differences in style and fruit lengths. These do not appear to define genetically discrete taxa. The species apparently is restricted to El Dorado County, California, and the Carson Range in Washoe County, Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 7, p. 311.	FNA vol. 7, p. 294.
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. 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. 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. asterophora var. macrocarpa
Name authority	Al-Shehbaz: Harvard Pap. Bot. 14: 83, fig. 1. (2009)	Payson: Amer. J. Bot. 4: 263. (1917)
Web links	WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Draba asterophora

Lake Tahoe Draba, Tahoe Draba

Habit

Perennials; (densely cespitose); caudex few-branched (compact, with persistent, thickened leaves); not scapose.

Perennials; (loosely cespitose); caudex branched (somewhat surculose, with persistent leaf bases, branches sometimes terminating in sterile rosettes); 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, 0.3–1.1 dm, glabrous throughout or sparsely pubescent proximally, trichomes (2–)4-rayed, 0.1–0.3 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;

petiolate;

petiole obsolete, margin rarely ciliate proximally;

blade (somewhat fleshy), broadly obovate to suborbicular or spatulate, 0.4–1.4(–1.7) cm × (2–)3–6(–7) mm, margins entire, surfaces pubescent, trichomes stalked, cruciform, and 2-, 3-, or 5-rayed, 0.2–0.6 mm.

Cauline leaves

6–8;

sessile;

blade linear-oblong, 0.5–0.8 cm × 1–2 mm (widest about base), margins entire, (ciliate).

0 (or 1, as a bract).

Racemes

10–26-flowered, ebracteate, elongated in fruit;

rachis not flexuous, usually glabrous, rarely pubescent, (trichomes non-crisped, simple and 2-rayed).

(5–)8–20(–27)-flowered, usually ebracteate, rarely proximalmost flowers bracteate, elongated in fruit;

rachis not flexuous, glabrous.

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 oblong, 3–4 mm, glabrous or sparsely pubescent, (trichomes subapical, short-stalked, 2–4-rayed);

petals bright yellow, oblanceolate, 5–7 × 1.5–2.5 mm;

anthers ovate, 0.5–0.6 mm.

Fruiting pedicels

ascending, straight, 3–5(–7) mm, usually glabrous, rarely pilose, (trichomes simple and 2-rayed, stalked).

horizontal to divaricate-ascending, straight or curved upward, 3–9 mm, glabrous.

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.

lanceolate-ovate to broadly ovate or oblong, slightly twisted or plane, strongly flattened, 5–11(–14) × (3.5–)4–6 mm;

valves glabrous or, rarely, puberulent, trichomes simple and short-stalked, 2- or 3-rayed, 0.05–0.3 mm;

ovules 12–18 per ovary;

style 0.2–1.6(–2) mm.

Seeds

ovoid, 1 × 0.6 mm.

(winged), ovate, 1.8–2.8 × 1.2–2 mm; (wing 0.5–1 mm wide).

= 40.

Draba heilii

Draba asterophora

Phenology

Flowering Jun–Jul.

Flowering Jun–Aug.

Habitat

Alpine tundra

Granitic rock outcrops, talus, gravelly soil

Elevation

ca. 3700 m (ca. 12100 ft)

2600-3300 m (8500-10800 ft)

Distribution

[BONAP county map]

CA; NV

[BONAP county map]

Discussion

Draba heilii is restricted to Mora and Rio Arriba counties.

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

C. L. Hitchcock (1941) and R. C. Rollins (1993) divided Draba asterophora into two varieties based on minor differences in style and fruit lengths. These do not appear to define genetically discrete taxa. The species apparently is restricted to El Dorado County, California, and the Carson Range in Washoe County, Nevada.

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

Source

FNA vol. 7, p. 311.

FNA vol. 7, p. 294.

Parent taxa

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. 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. 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. asterophora var. macrocarpa

Name authority

Al-Shehbaz: Harvard Pap. Bot. 14: 83, fig. 1. (2009)

Payson: Amer. J. Bot. 4: 263. (1917)

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).

Choose a data source: Flora of North America

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Draba heilii

Draba asterophora

Draba heilii

Draba asterophora