Draba nemorosa

Linnaeus

Sp. Pl. 2: 643. 1753.

WeedyIntroduced
Synonyms: Draba dictyota Greene Draba nemoralis Ehrhart Draba nemorosa var. brevisilicula Zapa ł owicz Draba nemorosa var. hebecarpa Lindblom Draba nemorosa var. leiocarpa Lindblom Tomostima nemorosa
Treatment appears in FNA Volume 7. Treatment on page 321. Mentioned on page 272, 333.

Annuals; not scapose. Stems unbranched or branched proximally, (0.3–) 0.6–4.5 (–6) dm, densely pubescent proximally, glabrous distally, trichomes simple, 0.5–1.3 mm, and stalked, 2–4-rayed, 0.1–0.5 mm. Basal leaves rosulate or not, petiolate; petiole ciliate throughout; blade oblong-obovate or oblanceolate, (0.4–) 1–3.5 (–5) cm × (2–) 5–15 (–20) mm, margins usually dentate to denticulate, rarely subentire, surfaces sparsely to densely pubescent with stalked, 2-rayed or 3-rayed, and cruciform trichomes, 0.1–0.5 mm. Cauline leaves 4–12 (–15); sessile; blade broadly ovate to oblong, margins dentate or denticulate, surfaces pubescent, abaxially as basal, adaxially with primarily simple, and 2-rayed or 3-rayed trichomes. Racemes (10–) 18–60 (–92) -flowered, ebracteate, considerably elongated in fruit; rachis not flexuous (straight), glabrous. Fruiting pedicels divaricate, straight, 7–28 (–35) mm [(1.5–) 2–7 times longer than fruit], glabrous. Flowers: sepals ovate, (0.7–) 0.9–1.6 mm, sparsely pubescent, (trichomes simple); petals yellow, spatulate to oblanceolate, (1.2–) 1.7–2.2 (–2.5) × (0.4–) 0.6–1 mm, (deeply notched); anthers broadly ovate to subreniform, 0.1–0.2 mm. Fruits oblong to elliptic or, rarely, oblong-oblanceolate, plane, slightly flattened, (3–) 5–8 (–10) × 1.5–2.5 mm; valves glabrous or puberulent, trichomes simple, antrorse, 0.05–0.2 mm; ovules (30–) 36–60 (–72) per ovary; style 0.01–0.1 mm. Seeds ovoid, 0.5–0.7 (–0.8) × 0.3–0.4 (–0.5) mm. 2n = 16.


Phenology: Flowering Apr–Jul.
Habitat: Rock outcrops, open wooded slopes, meadows and prairies, stream banks, roadsides, disturbed gravelly grounds, waste places
Elevation: 0-2700 m

Distribution

V7 433-distribution-map.gif

Introduced; Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Calif., Colo., Idaho, Iowa, Mich., Minn., Mont., Nebr., Nev., N.Dak., Oreg., S.Dak., Utah, Wash., Wis., Wyo., Europe, Asia, also in Australia

Discussion

Selected References

None.

Lower Taxa

None.

"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 nemorosa"
broadly ovate +  and subreniform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Linnaeus +
not +  and rosulate +
appendaged +  and unappendaged +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lobed +, toothed +  and entire +
broadly ovate;oblong +
much smaller +  and reduced +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Iowa +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wis. +, Wyo. +, Europe +, Asia +  and also in Australia +
0-2700 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 +
latiseptate +, twisted +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
indehiscent +  and dehiscent +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
flattened +, plane +, oblong-oblanceolate +, , +, oblong +  and elliptic +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Rock outcrops, open wooded slopes, meadows and prairies, stream banks, roadsides, disturbed gravelly grounds, waste places +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate +  and entire +
denticulate;dentate;subentire;usually dentate;denticulate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
1.7mm;2.2mm +
rudimentary +
spatulate +  and oblanceolate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering Apr–Jul. +
trinucleate +  and 3(-11)-colpate +
ebracteate;(10-)18-60(-92)-flowered +
ascending +  and erect +
slender +
2.8 cm28 mm <br />0.028 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
straight +  and not flexuous +
mucilaginous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 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 +
Weedy +  and Introduced +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
prostrate +  and decumbent +
usually erect +  and ascending +
glabrous +  and pubescent +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.001 cm0.01 mm <br />1.0e-5 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Draba dictyota +, Draba nemoralis +, Draba nemorosa var. brevisilicula +, Draba nemorosa var. hebecarpa +, Draba nemorosa var. leiocarpa +  and Tomostima nemorosa +
Draba nemorosa +
species +
simple +  and stalked +
cruciform +
0.005 cm0.05 mm <br />5.0e-5 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
puberulent +  and glabrous +
anastomosing +
pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +