Difference between revisions of "Thelypodiopsis vaseyi"

(S. Watson ex B. L. Robinson) Rollins

Contr. Gray Herb. 206: 12. 1976.

Endemic
Basionym: Sisymbrium vaseyi S. Watson ex B. L. Robinson in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 138. 1895
Treatment appears in FNA Volume 7. Treatment on page 727. Mentioned on page 724.
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name=Thelypodiopsis vaseyi
 
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|tribe=Brassicaceae tribe Thelypodieae
 
|tribe=Brassicaceae tribe Thelypodieae
 
|genus=Thelypodiopsis
 
|genus=Thelypodiopsis

Latest revision as of 22:31, 5 November 2020

Annuals; (often glaucous), glabrous throughout. Stems unbranched or branched distally, 3–10 dm. Basal leaves (soon withered); not rosulate; blade oblong to lanceolate or oblanceolate, 3–6 cm × 5–15 mm, margins usually entire, rarely denticulate. Cauline leaves sessile; blade (proximalmost) oblong to lanceolate or oblanceolate, or (distal) linear to narrowly oblong or lanceolate, base auriculate, margins usually entire, rarely denticulate. Racemes lax. Fruiting pedicels horizontal to divaricate, straight or slightly recurved, (slender), 7–15 mm. Flowers: sepals spreading, whitish or purplish, 1.8–2.5 × 0.7–1 mm; petals white, obovate to spatulate, 2.5–4.5 × 1.7–2.5 mm, claw 1–1.5 mm; median filament pairs 1.7–2.5 mm; anthers ovate, 0.5–0.8 mm; gynophore 0.2–0.4 mm. Fruits erect to ascending, straight or curved, strongly torulose, 1.5–2.5 cm × 1–1.2 mm; ovules 20–32 per ovary; style cylindrical, 0.5–0.8 mm; stigma obscurely 2-lobed. Seeds 1–1.5 × 0.7–0.9 mm. 2n = 20.


Phenology: Flowering Jul–Aug.
Habitat: Open wooded slopes, mixed coniferous forests, canyons
Elevation: 1900-2500 m

Discussion

Thelypodiopsis vaseyi is known from Lincoln, Otero, and San Miguel counties in New Mexico and Culberson County in Texas. R. C. Rollins (1982b, 1993) did not record it from Texas; the first report from there is based on Johnston 3148 (MO), collected in Guadalupe Mountains. Sisymbrium watsonii Payson is an illegitimate name that pertains to S. vaseyi.

Selected References

None.

Lower Taxa

None.