Descurainia kenheilii

Al-Shehbaz

Harvard Pap. Bot. 12: 395, fig. 1. 2007.

Treatment appears in FNA Volume 7. Treatment on page 524. Mentioned on page 520.

Perennials; (short-lived, dwarf); eglandular; sparsely pubescent throughout, trichomes dendritic. Stems (simple from base), erect, usually unbranched, rarely branched distally, 0.1–0.15 dm. Basal leaves: petiole 0.3–0.6 cm; blade pinnate, oblanceolate in outline, lateral lobes (2–4 pairs), oblanceolate to obovate, (1–2.5 × 0.5–1 mm), margins entire. Cauline leaves subsessile; blade smaller distally, distal lobes narrower, surfaces sparsely pubescent. Racemes not elongated in fruit. Fruiting pedicels erect to ascending, straight, 1–1.5 mm. Flowers: sepals ascending, yellowish, ovate, 1–1.4 mm, pubescent; petals narrowly oblanceolate, 1–1.5 × 0.3–0.4 mm; median filaments 0.6–1 mm; anthers (broadly ovate), ca. 0.1 mm. Fruits erect, linear, torulose, 6–10 × 1–1.3 mm, (straight); valves each with distinct midvein; septum with distinct midvein; ovules 4–8 per ovary; style obsolete, 0.1–0.2 mm, glabrous. Seeds uniseriate, reddish-brown, oblong, 1–1.2 × 0.5–0.6 mm.


Phenology: Flowering Aug–Sep.
Habitat: Alpine tundra, talus slopes
Elevation: 3600-3800 m

Discussion

Descurainia kenheilii is known from the high alpine areas in Archuleta and San Juan counties.

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 "Descurainia kenheilii"
oblong +  and ovate +
Barbara E. Goodson +  and Ihsan A. Al-Shehbaz +
Al-Shehbaz +
appendaged +  and unappendaged +
not auriculate +
dissected +, repand +, sinuate +, crenate +  and dentate +
oblanceolate +
smaller +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
not +  and differentiated +
emarginate +  and entire +
3600-3800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
0.1 cm1 mm <br />0.001 m <br /> (?) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
torulose +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Alpine tundra, talus slopes +
oblanceolate;obovate +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
toothed;entire +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
white +  and yellow +
1mm;1.5mm +
rudimentary +
oblanceolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Aug–Sep. +
trinucleate +  and 3(-11)-colpate +
Harvard Pap. Bot. +
bracteate;ebracteate +
erect +  and ascending +
slender +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
mucilaginous +
biseriate +  and uniseriate +
not +  and mucilaginous +
reddish-brown +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 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 +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
perforated +  and complete +
reduced +
terete +, torulose +, obovoid +, ellipsoid +, fusiform +, clavate +, oblong +  and linear +
terete +, torulose +, obovoid +, ellipsoid +, fusiform +, clavate +, oblong +  and linear +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
Huguenenia +  and Sophia +
Descurainia kenheilii +
Descurainia +
species +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +