Draba oxycarpa

Sommerfelt

Mag. Naturvidensk., n. s. 1: 240. 1833.

Synonyms: Draba alpina var. oxycarpa (Sommerfelt) Th. Fries Draba gredinii E. Ekman
Treatment appears in FNA Volume 7. Treatment on page 325. Mentioned on page 285, 286, 287, 290.

Perennials; (cespitose); caudex branched (covered with persistent petiole remains); scapose. Stems unbranched, 0.2–1.1 dm, pubescent proximally, trichomes short-stalked, 2–5-rayed, 0.1–0.5 mm, (some rays spurred). Basal leaves rosulate; petiolate; petiole base and margin ciliate, (trichomes simple, 0.3–1 mm); blade oblanceolate to lanceolate, 0.8–2.2 cm × 2–6 mm, margins often entire, surfaces pubescent abaxially with stalked, 2–5-rayed, stellate trichomes, 0.1–0.4 mm, often some rays spurred and trichomes appearing subdendritic, rarely glabrate, or with simple and 2-rayed ones, (midvein obscure abaxially, not thickened), adaxially glabrous or sparsely pubescent with simple trichomes, sometimes with long-stalked, 2-rayed or 3-rayed ones. Cauline leaves 0. Racemes (2–) 4–13-flowered, ebracteate, (subcorymbose), not elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels subhorizontal to divaricate-ascending (not appressed to rachis), often slightly curved upward, 4–7 (–10) mm, pubescent, trichomes simple (0.4–1 mm), and 2–4-rayed (0.1–0.4 mm). Flowers: sepals (grayish white), ovate to broadly so, 2.5–3 mm, pubescent, (trichomes simple and stalked, 2-rayed); petals creamy white to yellow, broadly obovate, 3.5–5 × 2.5–3.5 mm; anthers ovate, 0.4–0.5 mm. Fruits ovate to ovate-oblong, plane, flattened, 5–10 × 3–5 mm; valves puberulent along replum, trichomes simple, 0.1–0.3 mm; ovules (16–) 18–28 per ovary; style 0.2–0.6 mm (stigma as wide as style). Seeds (black), ovoid, 1–1.3 × 0.6–0.8 mm. 2n = 64.


Phenology: Flowering Jun–Jul.
Habitat: Rocky soils

Distribution

V7 441-distribution-map.gif

Greenland, Europe (Norway [including Spitsbergen]), Europe (Sweden), Atlantic Islands (Iceland)

Discussion

Draba oxycarpa is an octoploid that most closely resembles the decaploid D. alpina. It is distinguished from that species by having creamy white to pale yellow (versus bright yellow) petals, gray-green (versus purplish tinged) sepals, petals 2.5–3.5 (versus 1.7–2.5) mm wide, stems pubescent proximally with primarily branched (versus primarily simple) trichomes, nearly black (versus pale brown) seeds, and ovate to ovate-oblong (versus elliptic) fruits 3–5 (versus 2–3) mm wide.

Selected References

None.

Lower Taxa

None.

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

... more about "Draba oxycarpa"
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Sommerfelt +
appendaged +  and unappendaged +
not +  and auriculate +
0.8 cm8 mm <br />0.008 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
lobed +, toothed +  and entire +
oblanceolate;lanceolate +
much smaller +  and reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
urceolate +, campanulate +  and tubular +
scapose +  and branched +
sessile +  and petiolate +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
Greenland +, Europe (Norway [including Spitsbergen]) +, Europe (Sweden) +  and Atlantic Islands (Iceland) +
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 +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
latiseptate +, twisted +  and sessile +
indehiscent +  and dehiscent +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
flattened +, plane +, ovate +  and ovate-oblong +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Rocky soils +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
creamy white +  and yellow +
3.5mm;5mm +
rudimentary +
obovate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Flowering Jun–Jul. +
trinucleate +  and 3(-11)-colpate +
Mag. Naturvidensk., n. s. +
ebracteate;(2-)4-13-flowered +
ascending +  and erect +
slender +
not flexuous +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
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 +
procumbent +  and decumbent +
prostrate +  and decumbent +
usually erect +  and ascending +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Draba alpina var. oxycarpa +  and Draba gredinii +
Draba oxycarpa +
species +
simple +, subdendritic +, stalked +  and short-stalked +
pubescent +, glabrous +  and glabrate +
cruciform +  and forked +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
scapose +  and not +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
subhorizontal +  and divaricate-ascending +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +