FNA: Draba heilii vs. Draba bifurcata

	Draba heilii	Draba bifurcata

Habit	Perennials; (densely cespitose); caudex few-branched (compact, with persistent, thickened leaves); not scapose.	Biennials or, rarely, perennials; caudex simple or branched; not 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.	branched or unbranched, 1–3.9 dm, pubescent throughout or proximally, trichomes simple, 0.3–1.4 mm, often with smaller, 2 (or 3)-rayed ones.
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).	(soon withered); rosulate; petiolate; petiole ciliate, (trichomes simple, 0.4–1.1 mm); blade oblanceolate to spatulate, 1–7 cm × 2–12(–26) mm, margins entire or dentate (pubescent as petiole), surfaces pubescent, abaxially with simple trichomes, 0.6–1.1 mm, and stalked, 2- (or 3-)rayed ones, often smaller, adaxially with subsetiform, simple trichomes, 0.5–1.2 mm (rarely with fewer, stalked, 2-rayed ones).
Cauline leaves	6–8; sessile; blade linear-oblong, 0.5–0.8 cm × 1–2 mm (widest about base), margins entire, (ciliate).	(2–)6–15; sessile; blade lanceolate to ovate or oblong, margins dentate, surfaces pubescent as basal.
Racemes	10–26-flowered, ebracteate, elongated in fruit; rachis not flexuous, usually glabrous, rarely pubescent, (trichomes non-crisped, simple and 2-rayed).	10–51-flowered, ebracteate, elongated in fruit; rachis glabrous or pubescent as stem, not flexuous.
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 ovate, 2.5–3.2 mm, pubescent, (trichomes simple and short-stalked, 2-rayed); petals yellow, oblanceolate, 4.5–6.5 × 1.5–2 mm; anthers oblong, 0.8–1.1 mm.
Fruiting pedicels	ascending, straight, 3–5(–7) mm, usually glabrous, rarely pilose, (trichomes simple and 2-rayed, stalked).	horizontal to divaricate, straight, 4–15 mm, glabrous or pubescent, trichomes simple and 2-rayed.
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.	elliptic-lanceolate, twisted (1 turn or plane), flattened, 6–10 × 2–2.5 mm; valves glabrous or sparsely puberulent, trichomes simple, 0.05–0.15 mm; ovules 14–20 per ovary; style (1–)2–3 mm.
Seeds	ovoid, 1 × 0.6 mm.	oblong, 1.1–1.4 × 0.7–0.9 mm.

	Draba heilii	Draba bifurcata
Phenology	Flowering Jun–Jul.	Flowering Jun–Jul.
Habitat	Alpine tundra	Rocky areas, damp shady ravines, aspen-spruce communities
Elevation	ca. 3700 m (ca. 12100 ft)	1800-3600 m (5900-11800 ft)
Distribution	NM [BONAP county map]	AZ [BONAP county map]
Discussion	Draba heilii is restricted to Mora and Rio Arriba counties. (Discussion copyrighted by Flora of North America; reprinted with permission.)	Draba bifurcata is distinguished from other North American species by a combination of yellow flowers with styles (1–)2–3 mm and almost exclusively simple trichomes on the abaxial surface of cauline leaf blades. It is known only from Chiricahua, Santa Catalina, and White mountains in Apache, Cochise, and Pima counties. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 7, p. 311.	FNA vol. 7, p. 295.
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. asterophora, D. aurea, D. aureola, 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. helleriana var. bifurcata
Name authority	Al-Shehbaz: Harvard Pap. Bot. 14: 83, fig. 1. (2009)	(C. L. Hitchcock) Al-Shehbaz & Windham: Harvard Pap. Bot. 12: 411. (2007)
Web links	WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Draba bifurcata

Habit

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

Biennials or, rarely, perennials; caudex simple or branched; not 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.

branched or unbranched, 1–3.9 dm, pubescent throughout or proximally, trichomes simple, 0.3–1.4 mm, often with smaller, 2 (or 3)-rayed ones.

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).

(soon withered); rosulate;

petiolate;

petiole ciliate, (trichomes simple, 0.4–1.1 mm);

blade oblanceolate to spatulate, 1–7 cm × 2–12(–26) mm, margins entire or dentate (pubescent as petiole), surfaces pubescent, abaxially with simple trichomes, 0.6–1.1 mm, and stalked, 2- (or 3-)rayed ones, often smaller, adaxially with subsetiform, simple trichomes, 0.5–1.2 mm (rarely with fewer, stalked, 2-rayed ones).

Cauline leaves

6–8;

sessile;

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

(2–)6–15;

sessile;

blade lanceolate to ovate or oblong, margins dentate, surfaces pubescent as basal.

Racemes

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

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

10–51-flowered, ebracteate, elongated in fruit;

rachis glabrous or pubescent as stem, not flexuous.

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 ovate, 2.5–3.2 mm, pubescent, (trichomes simple and short-stalked, 2-rayed);

petals yellow, oblanceolate, 4.5–6.5 × 1.5–2 mm;

anthers oblong, 0.8–1.1 mm.

Fruiting pedicels

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

horizontal to divaricate, straight, 4–15 mm, glabrous or pubescent, trichomes simple and 2-rayed.

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.

elliptic-lanceolate, twisted (1 turn or plane), flattened, 6–10 × 2–2.5 mm;

valves glabrous or sparsely puberulent, trichomes simple, 0.05–0.15 mm;

ovules 14–20 per ovary;

style (1–)2–3 mm.

Seeds

ovoid, 1 × 0.6 mm.

oblong, 1.1–1.4 × 0.7–0.9 mm.

Draba heilii

Draba bifurcata

Phenology

Flowering Jun–Jul.

Habitat

Alpine tundra

Rocky areas, damp shady ravines, aspen-spruce communities

Elevation

ca. 3700 m (ca. 12100 ft)

1800-3600 m (5900-11800 ft)

Distribution

[BONAP county map]

Discussion

Draba heilii is restricted to Mora and Rio Arriba counties.

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

Draba bifurcata is distinguished from other North American species by a combination of yellow flowers with styles (1–)2–3 mm and almost exclusively simple trichomes on the abaxial surface of cauline leaf blades. It is known only from Chiricahua, Santa Catalina, and White mountains in Apache, Cochise, and Pima counties.

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

Source

FNA vol. 7, p. 311.

FNA vol. 7, p. 295.

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. asterophora, D. aurea, D. aureola, 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. helleriana var. bifurcata

Name authority

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

(C. L. Hitchcock) Al-Shehbaz & Windham: Harvard Pap. Bot. 12: 411. (2007)

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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Flora of North America species comparison

Draba heilii

Draba bifurcata

Draba heilii

Draba bifurcata