Draba incana

Linnaeus

Sp. Pl. 2: 643. 1753.

Synonyms: Draba confusa Ehrhart Draba contorta Ehrhart Draba incana subsp. confusa (Ehrhart) E. Ekman Draba incana var. confusa (Ehrhart) Liljeblad Draba incana var. contorta (Ehrhart) Liljeblad
Treatment appears in FNA Volume 7. Treatment on page 312. Mentioned on page 272.

Biennials; not scapose. Stems usually branched, rarely unbranched, (0.3–) 0.6–3 (–4) dm, densely pubescent proximally, trichomes simple, 0.4–1.3 mm, with fewer 2–4-rayed ones, to 0.3 mm, (distally with mostly branched trichomes, with fewer, simple ones). Basal leaves rosulate; petiolate; petiole base and margin ciliate, (trichomes simple, 0.2–0.7 mm); blade lanceolate or oblanceolate to spatulate, 0.5–2.9 cm × 1–5 (–9) mm, margins dentate, surfaces pubescent, abaxially with stalked, cruciform, or 2-rayed or 3-rayed trichomes, 0.1–0.4 mm, (rarely with a branched ray), adaxially with simple trichomes, 0.1–0.7 mm, and stalked, 2–4-rayed ones. Cauline leaves (15–) 22–54 (–76), (densely imbricate at least basally); sessile; blade ovate to oblong or lanceolate (base often densely bearded abaxially, trichomes simple, to 1.3 mm), margins dentate, surfaces pubescent as basal. Racemes (11–) 17–36 (–48) -flowered, bracteate basally, elongated or not in fruit; rachis not flexuous, pubescent as stems distally. Fruiting pedicels erect to ascending, (subappressed to rachis), straight, (1.5–) 2.5–6 (–13) mm, pubescent, trichomes 2–4-rayed and simple. Flowers: sepals ovate, 2–2.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed); petals white, spatulate, 3.5–4.5 × 1–2 mm; anthers ovate, 0.3–0.4 mm. Fruits oblong to linear-lanceolate or elliptic, slightly twisted or plane, flattened, 5–10 (–12) × 1.5–2.5 (–3) mm; valves glabrous or pubescent, trichomes simple and short-stalked, 2–4-rayed, 0.05–0.3 mm; ovules (24–) 30–40 per ovary; style 0.01–0.25 mm. Seeds oblong, 0.7–1.1 × 0.5–0.6 mm. 2n = 32.


Phenology: Flowering Jul–Aug.
Habitat: Rock outcrops, talus, gravelly shores
Elevation: 0-200 m

Distribution

V7 413-distribution-map.gif

Greenland, Man., N.B., Nfld. and Labr., Ont., P.E.I., Que., Mich., Minn., n, c Europe (Russia)

Discussion

Selected References

None.

Lower Taxa

None.

"not" is not a number. "elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Draba incana"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Linnaeus +
appendaged +  and unappendaged +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
not +  and auriculate +
0.5 cm5 mm <br />0.005 m <br /> (2.9 cm29 mm <br />0.029 m <br />) +
lobed +, toothed +  and entire +
ovate;oblong or lanceolate +
much smaller +  and reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
Greenland +, Man. +, N.B. +, Nfld. and Labr. +, Ont. +, P.E.I. +, Que. +, Mich. +, Minn. +, n +  and c Europe (Russia) +
0-200 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
not basally +  and dilated +
actinomorphic +
orange;purple;orange;purple;pink;white;yellow +
spreading +, ascending +  and erect +
linear +, oblanceolate +, spatulate +, obovate +, subsaccate +, not saccate +, oblong +  and ovate +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
indehiscent +  and dehiscent +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
flattened +, plane +, oblong +  and linear-lanceolate or elliptic +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Rock outcrops, talus, gravelly shores +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
3.5mm;4.5mm +
rudimentary +
spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering Jul–Aug. +
trinucleate +  and 3(-11)-colpate +
bracteate;(11-)17-36(-48)-flowered +
ascending +  and erect +
slender +
not flexuous +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 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 +
tetradynamous +
unbranched +  and branched +
procumbent +  and decumbent +
prostrate +  and decumbent +
usually erect +  and ascending +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.001 cm0.01 mm <br />1.0e-5 m <br /> (0.025 cm0.25 mm <br />2.5e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Draba confusa +, Draba contorta +, Draba incana subsp. confusa +, Draba incana var. confusa +  and Draba incana var. contorta +
Draba incana +
species +
short-stalked +, simple +  and stalked +
cruciform +
0.005 cm0.05 mm <br />5.0e-5 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
erect +  and ascending +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +