Flora of North America species comparison

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Draba abajoensis
Habit Perennials; caudex simple or branched, (sometimes with persistent leaf bases); not scapose.
Stems

unbranched, (0.6–)1–2.5(–3.5) dm, pubescent proximally, usually glabrous distally, rarely sparsely pubescent, trichomes simple, 0.1–0.5 mm, often with stalked, 2(–4)-rayed ones.
Basal leaves

rosulate;

petiolate;

petiole (0.2–1(–2) cm), proximal margin ciliate, (trichomes simple, 0.2–0.7 mm);

blade oblanceolate to spatulate, (0.6–)1–3.5(–4.3) cm × (2–)4–10(–14) mm, margins entire or dentate, surfaces pubescent with short-stalked, (2–)4-rayed trichomes, 0.05–0.35 mm, sometimes adaxially with simple ones.
Cauline leaves

(3–)5–9(–11);

sessile;

blade broadly ovate to lanceolate or oblong, margins entire or dentate, surfaces pubescent as basal or adaxially also with mostly simple trichomes.
Racemes

(11–)15–32(–47)-flowered, ebracteate, elongated in fruit;

rachis not flexuous, glabrous or pubescent, trichomes simple and short-stalked, 2–4-rayed.
Flowers

sepals ovate-oblong, 2.2–3.5 mm, subapically sparsely pubescent, (trichomes simple, short-stalked, and 2-rayed);

petals yellow, oblanceolate, 4–6 × 1.5–2 mm;

anthers oblong, 0.6–1 mm.
Fruiting pedicels

horizontal to divaricate-ascending, straight or curved, (5–)7–18(–23) mm, glabrous or sparsely pubescent abaxially, trichomes simple and 2-rayed.
Fruits

elliptic to elliptic-lanceolate, plane, flattened, 5–9(–12) × 2–3 mm;

valves glabrous;

ovules 10–18 per ovary;

style (0.8–)1.4–2.7(–3.6) mm.
Seeds

ovoid, 1–1.2 × 0.7–0.8 mm.
2n

= 20.

Draba abajoensis
Phenology Flowering May–Aug.
Habitat Spruce, fir, or pine forests, subalpine meadows
Elevation 1900-3800 m (6200-12500 ft)
Distribution
from FNA
AZ; NM; UT
[BONAP county map]
Discussion

Plants of Draba abajoensis were treated by C. L. Hitchcock (1941), R. C. Rollins (1993), and N. H. Holmgren (2005b) as D. spectabilis. The differences between these taxa in chromosome number and trichome morphology strongly support their recognition as separate species (I. A. Al-Shehbaz and M. D. Windham 2007). Draba abajoensis has been collected from the Chuska and Lukachukai mountains in Apache County, Arizona, Chuska Mountains in San Juan County, New Mexico, and Abajo and La Sal mountains in San Juan and Grand counties, Utah.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 288.
Parent taxa Brassicaceae > tribe Arabideae > Draba
Sibling taxa
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. 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. spectabilis var. glabrescens
Name authority Windham & Al-Shehbaz: Harvard Pap. Bot. 12: 416. (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).



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