Draba ramosissima

Desvaux

J. Bot. Agric. 3: 186. 1815.

Endemic
Synonyms: Alyssum dentatum Nuttall Draba dentata (Nuttall) Hooker & Arnott Draba ramosissima var. glabrifolia E. L. Braun
Treatment appears in FNA Volume 7. Treatment on page 332. Mentioned on page 279.

Perennials; caudex branched (well-developed, with persistent leaf-bases); not scapose. Stems unbranched proximally, paniculately branched distally, 0.7–3.8 (–5) dm, pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.1–0.6 mm, sometimes with simple ones, 0.4–0.8 mm. Basal leaves rosulate; petiolate; petiole (to 2 cm), ciliate (trichomes simple, 0.3–0.5 mm); blade oblanceolate, (0.7–) 1–5.5 cm × 2–8 mm, margins dentate, surfaces pubescent with short-stalked to subsessile, 3-rayed or 4-rayed trichomes, 0.1–0.5 mm, adaxially sometimes also simple, 0.4–1.3 mm. Cauline leaves (5–) 7–15 (–21); sessile; blade ovate to oblong or elliptic to lanceolate, margins usually coarsely dentate or serrate, rarely subpinnatifid, surfaces pubescent as basal. Racemes 9–28-flowered, ebracteate, paniculate; rachis not flexuous, pubescent as stem. Fruiting pedicels horizontal to divaricate-ascending, straight, (4–) 6–12 (–15) mm, pubescent, trichomes 2–4-rayed. Flowers: sepals oblong, 2.5–3 mm, pubescent, (trichomes simple and subsessile, 2–4-rayed); petals white, spatulate, 4–6 × 1.5–2.5 mm; anthers oblong, 0.5–0.6 mm. Fruits narrowly oblong to elliptic or oblong-lanceolate, often strongly twisted, flattened, 5–11 × 1.5–2.2 mm; valves pubescent, trichomes subsessile or sessile, 2–4-rayed, 0.07–0.3 mm; ovules 4–10 (–12) per ovary; style (1) 1.5–3 (–4) mm, (sparsely pubescent). Seeds oblong, 1.2–1.8 × 0.6–0.9 mm. 2n = 16.


Phenology: Flowering Apr–Jun.
Habitat: Limestone cliffs and outcrops, shale barrens, rocky wooded areas
Elevation: 0-1100 m

Distribution

V7 455-distribution-map.gif

D.C., Ky., Md., N.C., Tenn., Va., W.Va.

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 ramosissima"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Desvaux +
appendaged +  and unappendaged +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
lobed +, toothed +  and entire +
ovate;oblong or elliptic +
much smaller +  and reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
urceolate +, campanulate +  and tubular +
not scapose +  and branched +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
D.C. +, Ky. +, Md. +, N.C. +, Tenn. +, Va. +  and W.Va. +
0-1100 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 +
indehiscent +  and dehiscent +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
flattened +, narrowly oblong +  and elliptic or oblong-lanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Limestone cliffs and outcrops, shale barrens, rocky wooded areas +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
subpinnatifid +
serrate +  and dentate +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
rudimentary +
spatulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering Apr–Jun. +
trinucleate +  and 3(-11)-colpate +
J. Bot. Agric. +
ebracteate;9-28-flowered +
ascending +  and erect +
slender +
not flexuous +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 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 +
branched +  and unbranched +
procumbent +  and decumbent +
prostrate +  and decumbent +
usually erect +  and ascending +
subsessile +, sessile +  and petiolate +
1 cm10 mm <br />0.01 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Alyssum dentatum +, Draba dentata +  and Draba ramosissima var. glabrifolia +
Draba ramosissima +
species +
sessile +, subsessile +  and short-stalked +
cruciform +  and forked +
0.007 cm0.07 mm <br />7.0e-5 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
scapose +  and not +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
horizontal +  and divaricate-ascending +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +