Erysimum capitatum var. purshii

(Durand) Rollins

Cruciferae Continental N. Amer., 482. 1993.

Basionym: Erysimum asperum var. purshii Durand Trans. Amer. Philos. Soc., n. s. 11: 159. 1859
Synonyms: Cheiranthus alpestris (Cockerell) A. Heller Cheiranthus argillosus Greene Cheiranthus aridus A. Nelson Cheiranthus asperrimus Greene Cheiranthus bakeri Greene Cheiranthus nivalis Greene Cheiranthus nivalis var. amoenus Greene Cheiranthus oblanceolatus (Rydberg) A. Heller Cheiranthus radicatus (Greene) Rydberg Cheirinia amoena (Greene) Rydberg Cheirinia argillosa (A. Nelson) Rydberg Cheirinia arida (Greene) Rydberg Cheirinia asperrima (Greene) Rydberg Cheirinia bakeri Rydberg Cheirinia brachycarpa (Daniels) Cockerell Cheirinia cockerelliana Wooton & Standley Cheirinia desertorum (Greene) Rydberg Cheirinia nivalis (Rydberg) Rydberg Cheirinia nivalis var. radicata (Rydberg) Cockerell Cheirinia oblanceolata (Greene) Rydberg Cheirinia radicata Rydberg Erysimum amoenum (Greene) Rydberg Erysimum angustatum (A. Nelson) A. Nelson Erysimum argillosum (Greene) Rydberg Erysimum aridum (Greene) Rydberg Erysimum asperrimum Daniels Erysimum asperum var. amoenum (Greene) Reveal Erysimum asperum var. angustatum (Rydberg) B. Boivin Erysimum asperum var. pumilum S. Watson Erysimum bakeri Rydberg Erysimum capitatum var. amoenum (Greene) R. J. Davis Erysimum capitatum var. argillosum (Greene) R. J. Davis Erysimum capitatum var. nivale (Greene) N. H. Holmgren Erysimum cockerellianum Erysimum desertorum Erysimum nivale Erysimum oblanceolatum Erysimum radicatum
Treatment appears in FNA Volume 7. Treatment on page 538. Mentioned on page 537.

Proximal leaves with mostly 2-rayed or 3-rayed trichomes adaxially. Flowers: petals usually yellow, rarely lavender or purplish. Fruits usually 4-angled, rarely latiseptate. Seeds 1.5–2 (–2.4) × 0.7–1.2 mm; not winged. 2n = 36.


Phenology: Flowering Apr–Sep.
Habitat: Meadows, dry slopes, hillsides
Elevation: 1000-3800 m

Distribution

V7 851-distribution-map.gif

Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Tex., Utah, Wyo., Mexico (Chihuahua), Mexico (Michoacán), Mexico (Sonora), Mexico (Zacatecas)

Discussion

Plants of var. purshii were placed by G. B. Rossbach (1958) in three species (Erysimum angustatum, E. argillosum, E. desertorum) and by R. C. Rollins (1993) in two species (E. angustatum, E. capitatum). The considerable overlap in morphology and the frequent hybridization between vars. capitatum and purshii in areas where their geographical ranges meet argue against such delimitation. Forms with linear leaves to 3 mm wide, which are restricted to eastern Alaska and western Yukon, were recognized by Rossbach and Rollins as E. angustatum, but these hardly differ from typical var. purshii in all other characters.

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.

linear +  and oblong +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
rounded +  and acute +
Ihsan A. Al-Shehbaz +
(Durand) Rollins +
not +  and rosulate +
attenuate +
Erysimum asperum var. purshii +
appendaged +  and unappendaged +
18 cm180 mm <br />0.18 m <br /> (27 cm270 mm <br />0.27 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
not auriculate +
2 cm20 mm <br />0.02 m <br /> (18 cm180 mm <br />0.18 m <br />) +
denticulate +  and entire +
spatulate;narrowly oblanceolate or linear +
much smaller +  and reduced +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
differentiated +
emarginate +  and entire +
Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Tex. +, Utah +, Wyo. +, Mexico (Chihuahua) +, Mexico (Michoacán) +, Mexico (Sonora) +  and Mexico (Zacatecas) +
1000-3800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
tetradynamous +
ascending to erect +  and divaricate +
11 cm110 mm <br />0.11 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not striped +
curved +, straight +  and linear +
3.5 cm35 mm <br />0.035 m <br /> (11 cm110 mm <br />0.11 m <br />) +
4-angled +
slender +  and stout +
0.4 cm4 mm <br />0.004 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
latiseptate +  and unsegmented +
angustiseptate +, terete +  and 4-angled +
Meadows, dry slopes, hillsides +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate to denticulate +  and entire +
repand;dentate-sinuate;repand;dentate-sinuate;denticulate;dentate +
0.9 cm9 mm <br />0.009 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
purplish +, lavender +  and yellow +
12mm;25mm +
rudimentary +
suborbicular +  and obovate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Apr–Sep. +
trinucleate +  and 3(-11)-colpate +
Cruciferae Continental N. Amer., +
spreading +, horizontal +, reflexed +, ascending +  and erect +
stout +  and slender +
mucilaginous +
uniseriate +  and biseriate +
0.2 cm2 mm <br />0.002 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 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 +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
distinct +
cylindrical +
slender +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Cheiranthus alpestris +, Cheiranthus argillosus +, Cheiranthus aridus +, Cheiranthus asperrimus +, Cheiranthus bakeri +, Cheiranthus nivalis +, Cheiranthus nivalis var. amoenus +, Cheiranthus oblanceolatus +, Cheiranthus radicatus +, Cheirinia amoena +, Cheirinia argillosa +, Cheirinia arida +, Cheirinia asperrima +, Cheirinia bakeri +, Cheirinia brachycarpa +, Cheirinia cockerelliana +, Cheirinia desertorum +, Cheirinia nivalis +, Cheirinia nivalis var. radicata +, Cheirinia oblanceolata +, Cheirinia radicata +, Erysimum amoenum +, Erysimum angustatum +, Erysimum argillosum +, Erysimum aridum +, Erysimum asperrimum +, Erysimum asperum var. amoenum +, Erysimum asperum var. angustatum +, Erysimum asperum var. pumilum +, Erysimum bakeri +, Erysimum capitatum var. amoenum +, Erysimum capitatum var. argillosum +, Erysimum capitatum var. nivale +, Erysimum cockerellianum +, Erysimum desertorum +, Erysimum nivale +, Erysimum oblanceolatum +  and Erysimum radicatum +
Erysimum capitatum var. purshii +
Erysimum capitatum +
variety +
scale-like +  and forked +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +  and biennial +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +