Erysimum arenicola

S. Watson

Proc. Amer. Acad. Arts 26: 124. 1891.

Endemic
Synonyms: Cheiranthus arenicola (S. Watson) Greene Erysimum arenicola var. torulosum (Piper) C. L. Hitchcock Erysimum torulosum
Treatment appears in FNA Volume 7. Treatment on page 536. Mentioned on page 535, 537.

Perennials; (caudex simple or many-branched). Trichomes of leaves 2-rayed or 3-rayed. Stems erect, unbranched or branched (several) basally, 0.4–3 dm. Basal leaves: blade usually oblanceolate, rarely spatulate, 2–8 cm × 3–10 mm, base attenuate, margins entire or dentate, apex acute or obtuse. Cauline leaves (distal) sessile; blade margins entire or dentate-sinuate. Racemes considerably elongated in fruit. Fruiting pedicels divaricate-ascending, slender, narrower than fruit, 5–8 mm. Flowers: sepals oblong to linear-oblong, 7–10 mm, lateral pair saccate basally; petals yellow, obovate, 14–27 × 3.5–6 mm, claw 9–13 mm, apex rounded; median filaments 9–12 mm; anthers linear, 2–3.5 mm. Fruits erect to ascending, narrowly linear, often straight, sometimes twisted, strongly torulose, 3–10 (–12) cm × 1.5–2.7 mm, latiseptate, not striped; valves with somewhat prominent midvein, pubescent outside, trichomes 2–4-rayed, glabrous inside; ovules 24–42 per ovary; style cylindrical, slender, 1.5–5 mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. Seeds oblong, 2–3.5 × 0.8–1.5 mm; not winged or winged distally. 2n = 36.


Phenology: Flowering Jun–Aug.
Habitat: Rock crevices, talus slopes, alpine areas, open ridges, gravelly ground
Elevation: 900-2200 m

Discussion

Erysimum arenicola is distributed at the higher elevations of northern Oregon northward into the Olympic and Cascade mountains in Washington and Vancouver Island.

Both G. B. Rossbach (1958) and R. C. Rollins (1993) recognized Erysimum arenicola as a distinct species. It is closely related to E. perenne and both can be easily distinguished from E. capitatum, with which they hybridize where their ranges meet, by the strongly torulose (versus not torulose) fruits and the longer styles 1.5–5.5 versus 0.2–2.5(–3) mm.

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.

... more about "Erysimum arenicola"
linear +  and oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
rounded +, obtuse +  and acute +
Ihsan A. Al-Shehbaz +
S. Watson +
not +  and rosulate +
attenuate +
appendaged +  and unappendaged +
not auriculate +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
dentate-sinuate +  and entire +
spatulate;oblanceolate +
much smaller +  and reduced +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
differentiated +
emarginate +  and entire +
B.C. +, Oreg. +  and Wash. +
900-2200 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
tetradynamous +
latiseptate +  and twisted +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not striped +
straight +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
erect +  and ascending +
torulose +
slender +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
latiseptate +  and unsegmented +
angustiseptate +, terete +  and 4-angled +
Rock crevices, talus slopes, alpine areas, open ridges, gravelly ground +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate +  and entire +
repand;dentate-sinuate;repand;dentate-sinuate;denticulate;dentate +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
14mm;27mm +
rudimentary +
obovate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Jun–Aug. +
trinucleate +  and 3(-11)-colpate +
Proc. Amer. Acad. Arts +
spreading +, horizontal +, reflexed +, ascending +  and erect +
stout +  and slender +
mucilaginous +
winged +  and not winged +
uniseriate +  and biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
persistent +  and caducous +
distinct +
oblong +  and linear-oblong +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
cylindrical +
slender +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Cheiranthus arenicola +, Erysimum arenicola var. torulosum +  and Erysimum torulosum +
Erysimum arenicola +
Erysimum +
species +
scale-like +  and forked +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +