Draba aureola

S. Watson in W. H. Brewer et al.

in W. H. Brewer et al., Bot. California 2: 430. 1880.

IllustratedEndemic
Synonyms: Draba aureola var. paniculata L. F. Henderson
Treatment appears in FNA Volume 7. Treatment on page 295. Mentioned on page 278.

Perennials; (short-lived); caudex simple or branched (poorly developed, with persistent dry leaves); not scapose. Stems unbranched or branched, 0.3–1.5 dm, hirsute throughout, trichomes simple and long-stalked, 2–4-rayed, 0.2–1.5 mm. Basal leaves (forming dense clusters); rosulate; sessile; blade oblanceolate to linear, (0.7–) 1–2.5 (–3.2) cm × 2–3.5 (–5) mm, margins entire, (ciliate, trichomes simple and 2-rayed, 0.5–1.5 mm), surfaces densely hirsute, abaxially with stalked, 3–5-rayed trichomes, 0.1–0.5 mm, adaxially with simple and long-stalked, 2-rayed trichomes, to 1 mm, with smaller, 3–5-rayed ones. Cauline leaves 5–33; sessile; blade oblong to linear, margins entire, surfaces pubescent as basal. Racemes 12–83-flowered, ebracteate or proximalmost 1–9 flowers bracteate, slightly or not elongated in fruit; rachis not flexuous, hirsute as stem. Fruiting pedicels horizontal to divaricate, usually straight, rarely curved upward, (3–) 5–12 (–19) mm, hirsute as stem. Flowers: sepals ovate, 2.5–4 mm, glabrous; petals bright-yellow, linear to linear-oblanceolate, 4–6 × 0.5–1 (–1.2) mm; anthers narrowly oblong, 0.8–1 mm. Fruits oblong or, rarely, oblong-ovate, plane, flattened, (6–) 9–14 (–16) × 3–5 mm; valves pubescent, trichomes stalked, 2–4-rayed, 0.07–0.5 mm; ovules 10–20 per ovary; style (0.6–) 1–1.6 (–2) mm. Seeds oblong, 1.4–1.9 × 0.8–1.1 mm. 2n = 20.


Phenology: Flowering Jul–Aug.
Habitat: Open conifer forests, alpine meadows and moraines, talus slopes
Elevation: 2200-3200 m

Discussion

Draba aureola is known from Lassen, Shasta, and Siskiyou counties in California, Deschutes County in Oregon, and Lewis and Pierce counties in Washington.

Selected References

None.

Lower Taxa

None.

"elongated" is not a number."not" is not a number. "elongated" is not a number."thick" is not a number.

... more about "Draba aureola"
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
S. Watson in W. H. Brewer et al. +
appendaged +  and unappendaged +
2.5 cm25 mm <br />0.025 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
lobed +, toothed +  and entire +
oblong;linear +
much smaller +  and reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
urceolate +, campanulate +  and tubular +
not scapose +, branched +  and simple +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
Calif. +, Oreg. +  and Wash. +
2200-3200 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
not basally +  and dilated +
orange;purple;orange;purple;pink;white;yellow +
spreading +, ascending +  and erect +
linear +, oblanceolate +, spatulate +, obovate +, subsaccate +, not saccate +, oblong +  and ovate +
latiseptate +, twisted +  and sessile +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
indehiscent +  and dehiscent +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
flattened +, plane +, oblong-ovate +, , +  and oblong +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Open conifer forests, alpine meadows and moraines, talus slopes +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
smaller +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
bright-yellow +
rudimentary +
linear +  and linear-oblanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering Jul–Aug. +
trinucleate +  and 3(-11)-colpate +
in W. H. Brewer et al., Bot. California +
ebracteate;12-83-flowered +
ascending +  and erect +
proximalmost +
slender +
not flexuous +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
reduced +
latiseptate +, twisted +  and sessile +
indehiscent +  and dehiscent +
terete +, plane +, subglobose +, ovoid +, suborbicular +, linear +, oblong +, elliptic +, lanceolate +  and ovate +
latiseptate +, twisted +  and sessile +
indehiscent +  and dehiscent +
terete +, plane +, subglobose +, ovoid +, suborbicular +, linear +, oblong +, elliptic +, lanceolate +  and ovate +
Illustrated +  and Endemic +
tetradynamous +
branched +  and unbranched +
1.2 cm12 mm <br />0.012 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
curved +  and straight +
procumbent +  and decumbent +
prostrate +  and decumbent +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
subsessile +, sessile +  and petiolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
pubescent +  and hirsute +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Draba aureola var. paniculata +
Draba aureola +
species +
stalked +, long-stalked +  and simple +
cruciform +  and forked +
0.007 cm0.07 mm <br />7.0e-5 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
scapose +  and not +
pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +