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woodland draba, woodland whitlow-grass

Habit Plants annual.
Stems

(3)6–45(60) cm, pubescent with simple and stalked 2–4-rayed trichomes, glabrous distally.

Basal leaves

rosulate or not, oblong-obovate or oblanceolate; (4)10–35(50) × (2)5–15(20) mm;

margins dentate or rarely subentire;

surfaces pubescent with stalked, 2–4-rayed trichomes.

Cauline leaves

4–12(15); ovate to oblong;

margins dentate;

surfaces pubescent, sessile.

Inflorescences

(10)18–60(92)-flowered;

rachises straight, glabrous, fruiting pedicels divaricate; straight, 7–28(35) mm; (1.5)2–7 × as long as fruit, glabrous;

bracts 0.

Flowers

sepals ovate; (0.7)0.9–1.6 mm;

petals spatulate to oblanceolate; (1.2)1.7–2.2(2.5) × (0.4)0.6–1 mm, yellow;

tips deeply notched;

ovules (30)36–60(72) per ovary;

styles 0.01–0.1 mm.

Fruits

oblong, elliptic, or oblong-oblanceolate, slightly latiseptate, untwisted; (3)5–8(10) × 1.5–2.5 mm;

valves glabrous or puberulent with simple; antrorse trichomes.

Seeds

ovoid, 0.5–0.7(0.8) × 0.3–0.4(0.5) mm; wingless.

2n

=16.

Draba graminea

Draba nemorosa

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Open wooded slopes, rock outcrops, prairies, riverbanks, meadows, roadsides, gravelly grounds, waste places. Flowering Mar–Jul. 0–2200 m. BR, BW, Casc, Col, ECas, Lava, Owy. CA, ID, NV, WA; north to AK, northeast to Quebec, east to MI, southeast to NM; Asia, Europe. Native.

Source Flora of Oregon, volume 2, page 480
Ihsan Al-Shehbaz
Sibling taxa
D. albertina, D. aureola, D. cana, D. crassifolia, D. cusickii, D. cyclomorpha, D. densifolia, D. howellii, D. incerta, D. lonchocarpa, D. nemorosa, D. novolympica, D. oligosperma, D. praealta, D. stenoloba, D. verna
D. albertina, D. aureola, D. cana, D. crassifolia, D. cusickii, D. cyclomorpha, D. densifolia, D. howellii, D. incerta, D. lonchocarpa, D. novolympica, D. oligosperma, D. praealta, D. stenoloba, D. verna
Synonyms Draba nemorosa var. leiocarpa, Draba nemorosa var. nemorosa
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