Erysimum asperum

(Nuttall) de Candolle

Syst. Nat. 2: 505. 1821.

WeedyIllustratedEndemic
Basionym: Cheiranthus asper Nuttall Gen. N. Amer. Pl. 2: 69. 1818
Synonyms: Cheirinia aspera (Nuttall) Rydberg Erysimum asperum var. dolichocarpum O. E. Schulz
Treatment appears in FNA Volume 7. Treatment on page 537. Mentioned on page 535.

Biennials. Trichomes of leaves 2-rayed or 3-rayed. Stems erect, unbranched or branched distally, (0.6–) 1.2–6.5 (–8) dm. Basal leaves (often withered by fruiting); blade oblanceolate, 2–10 cm × (0.2–) 0.5–1.5 (–2.4) mm, base attenuate, margins dentate, apex acute. Cauline leaves (distal) sessile; blade margins entire or denticulate. Racemes considerably elongated in fruit. Fruiting pedicels horizontal to divaricate, slender, narrower than fruit, 5–16 (–25) mm. Flowers: sepals oblong to linear-oblong, 8–12 mm, lateral pair slightly saccate basally; petals yellow, obovate to suborbicular, 13–22 × 4–9 mm, claw 8–15 mm, apex rounded; median filaments 8–14 mm; anthers linear, 2.5–4 mm. Fruits widely spreading or divaricate, narrowly linear, usually straight, rarely curved upward, not torulose, (3–) 5–12 (–14) cm × 1.2–2.7 mm, 4-angled, strongly (longitudinally) 4-striped; valves with prominent midvein and replum, densely pubescent outside, trichomes 2-rayed between midvein and replum, glabrous inside; ovules 72–120 per ovary; style cylindrical, slender, 1–4 mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. Seeds ovoid, (1–) 1.3–2.3 × 0.7–1.2 mm; usually not winged, rarely winged distally. 2n = 36.


Phenology: Flowering Apr–Jun(-Aug).
Habitat: Prairies, sand dunes, roadsides, bluffs, sandhills along stream banks, knolls, open plains
Elevation: 200-2000 m

Distribution

V7 848-distribution-map.gif

Alta., Man., Sask., Ark., Colo., Ill., Kans., Minn., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

"wide" is not a number."elongated" is not a number."narrower" 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 "Erysimum asperum"
linear +  and oblong +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
rounded +  and acute +
Ihsan A. Al-Shehbaz +
(Nuttall) de Candolle +
not +  and rosulate +
attenuate +
Cheiranthus asper +
appendaged +  and unappendaged +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
not auriculate +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
denticulate +  and entire +
oblanceolate +
much smaller +  and reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
differentiated +
emarginate +  and entire +
Alta. +, Man. +, Sask. +, Ark. +, Colo. +, Ill. +, Kans. +, Minn. +, Mont. +, Nebr. +, N.Mex. +, N.Dak. +, Okla. +, S.Dak. +, Tex. +  and Wyo. +
200-2000 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
tetradynamous +
stipitate +  and sessile +
12 cm120 mm <br />0.12 m <br /> (14 cm140 mm <br />0.14 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
curved +  and straight +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
spreading +  and horizontal +
4-angled +  and not torulose +
slender +
0.5 cm5 mm <br />0.005 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
latiseptate +  and unsegmented +
angustiseptate +, terete +  and 4-angled +
Prairies, sand dunes, roadsides, bluffs, sandhills along stream banks, knolls, open plains +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
repand;dentate-sinuate;repand;dentate-sinuate;denticulate;dentate +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
13mm;22mm +
rudimentary +
obovate +  and suborbicular +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Flowering Apr–Jun(-Aug). +
trinucleate +  and 3(-11)-colpate +
spreading +, horizontal +, reflexed +, ascending +  and erect +
stout +  and slender +
mucilaginous +
uniseriate +  and biseriate +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
persistent +  and caducous +
distinct +
oblong +  and linear-oblong +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
Weedy +, Illustrated +  and Endemic +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
cylindrical +
slender +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Cheirinia aspera +  and Erysimum asperum var. dolichocarpum +
Erysimum asperum +
Erysimum +
species +
scale-like +  and forked +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +