Dimorphocarpa wislizeni

(Engelmann) Rollins

Publ. Bussey Inst. Harvard Univ. 1979: 24. 1979.

Basionym: Dithyrea wislizeni Engelmann in F. A. Wislizenius, Mem. Tour N. Mexico, 95. 1848
Synonyms: Biscutella wislizeni (Engelmann) Bentham & J. D. Hooker ex W. H. Brewer & S. Watson Dithyrea griffithsii Wooton & Standley Dithyrea wislizeni var. griffithsii (Wooton & Standley) Payson
Treatment appears in FNA Volume 7. Treatment on page 606. Mentioned on page 605.

Annuals. Stems unbranched or branched basally, branched distally, (1–)2–6(–8) dm. Basal leaves: petiole 1–4(–5) cm; blade lanceolate to linear-lanceolate, (2–)3–7(–10) cm × 4–15(–20) mm, base cuneate to attenuate, margins pinnately lobed to coarsely dentate. Cauline leaves: (proximalmost) petiole 1–4(–5) cm, (distalmost) shortly petiolate or subsessile; blade linear to narrowly lanceolate, base cuneate, margins usually entire, rarely dentate, or repand. Fruiting pedicels divaricate to slightly reflexed, (6–)8–14(–22) mm. Flowers: sepals (2.5–)3–4 × 1–1.5 mm, pubescent abaxially; petals white or lavender, 4–7(–8) × (2.5–)3–4(–5) mm, attenuate to claw, claw 1–1.5 mm, expanded basally; filaments white, 2–3.5 mm; anthers 0.7–1 mm. Fruits: each valve usually transversely ovoid-oblong, rarely suborbicular, 4–5.5(–6) × (4–)5–7(–7.5) mm (often longer than wide), base slightly rounded, apex truncate, with or without narrow wing beyond indurated part surrounding seeds, glabrous or pubescent; style 0.5–1(–1.2) mm. Seeds suborbicular-ovoid, 2–3 × 1.5–2 mm. 2n = 18.

Phenology: Flowering Feb–Oct.
Habitat: Sandy roadsides, sandstone knolls, sand hills and dunes, sandy streambeds and dry washes, desert flats
Elevation: 1000-2200 m


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Ariz., Colo., Nev., N.Mex., Tex., Utah, Mexico (Chihuahua, Coahuila).


Selected References


Lower Taxa

... more about "Dimorphocarpa wislizeni"
Ihsan A. Al-Shehbaz +
(Engelmann) Rollins +
Dithyrea wislizeni +
Ariz. +, Colo. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico (Chihuahua +  and Coahuila). +
1000-2200 m +
Sandy roadsides, sandstone knolls, sand hills and dunes, sandy streambeds and dry washes, desert flats +
Flowering Feb–Oct. +
Publ. Bussey Inst. Harvard Univ. +
Illustrated +
Biscutella wislizeni +, Dithyrea griffithsii +  and Dithyrea wislizeni var. griffithsii +
Dimorphocarpa wislizeni +
Dimorphocarpa +
species +