Draba simmonsii

Elven & Al-Shehbaz

Novon 18: 326. 2008.

Basionyms: Draba alpina var. gracilescens Simmons Vasc. Pl. Ellesmereland, 83, plate 6, figs. 1–3. 1906
Treatment appears in FNA Volume 7. Treatment on page 337. Mentioned on page 285.

Perennials; caudex branched (with persistent leaf-bases and petioles); scapose. Stems unbranched, (0.15–) 0.3–1.1 (–1.3) dm, often pubescent throughout, sometimes sparsely pubescent distally, trichomes stalked, 2–4-rayed, and fewer, simple ones, 0.1–0.3 (–0.6) mm. Basal leaves (not imbricate); rosulate; petiolate; petiole (base somewhat thickened), margin ciliate, (trichomes simple, 0.5–1 mm); blade oblong to oblong-lanceolate, 0.5–1.6 cm × 2–5 mm, margins entire (apex subacute to obtuse), surfaces pubescent throughout or glabrous adaxially, with simple and stalked, 2–4 (–6) -rayed, stellate to subdendritic trichomes. Cauline leaves 0. Racemes (2–) 4–10 (–14) -flowered, ebracteate, slightly elongated in fruit; rachis not flexuous (straight), pubescent as stem. Fruiting pedicels divaricate, straight, 2.5–10 mm, pubescent as stem. Flowers: sepals (purplish green), oblong, (2.5–) 2.8–3.5 (–3.8) mm, pubescent, (trichomes simple and sometimes short-stalked, 2-rayed); petals pale-yellow, narrowly obovate, (sides non-parallel), (3.5–) 3.8–5.5 (–5.8) × (2.5–) 2.8–4 (–4.6) mm, (emarginate); anthers ovate, ca. 0.5 mm. Fruits lanceolate, plane, slightly flattened, 5.5–9 (–11) × 2.3–3.8 mm; valves pubescent, trichomes simple, sometimes with fewer, 2-rayed ones, 0.1–0.3 mm; ovules 16–24 (–28) per ovary; style 0.1–0.3 mm (stigma as wide as style). Seeds (dark-brown), oblong-ovate, 1–1.3 × 0.7–0.8 mm.


Phenology: Flowering late Jun–Jul.
Habitat: Dry open ground, open patches in meadows or heath vegetation, outwash plains
Elevation: 0-100 m

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Draba simmonsii"
0.5 cm5 mm <br />0.005 m <br /> (?) +
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Elven & Al-Shehbaz +
Draba alpina var. gracilescens +
appendaged +  and unappendaged +
0.5 cm5 mm <br />0.005 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
lobed +, toothed +  and entire +
oblong;oblong-lanceolate +
much smaller +  and reduced +
2mm;5mm +
urceolate +, campanulate +  and tubular +
scapose +  and branched +
sessile +  and petiolate +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
N.W.T. +  and Nunavut. +
0-100 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
not basally +  and dilated +
actinomorphic +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
orange;purple;orange;purple;pink;white;yellow +
spreading +, ascending +  and erect +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
latiseptate +, twisted +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
indehiscent +  and dehiscent +
5.5mm;9mm +
flattened +, plane +  and lanceolate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Dry open ground, open patches in meadows or heath vegetation, outwash plains +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
rudimentary +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering late Jun–Jul. +
trinucleate +  and 3(-11)-colpate +
ebracteate;(2-)4-10(-14)-flowered +
elongated +
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 />) +
oblong-ovate +
0.07 cm0.7 mm <br />7.0e-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 +
straight +
procumbent +  and decumbent +
prostrate +  and decumbent +
usually erect +  and ascending +
0.25 cm2.5 mm <br />0.0025 m <br /> (1 cm10 mm <br />0.01 m <br />) +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
glabrous +  and pubescent +
Abdra +, Erophila +, Nesodraba +  and Tomostima +
Draba simmonsii +
species +
simple +, subdendritic +  and stalked +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
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 +
pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +