Horsfordia alata

(S. Watson) A. Gray

Proc. Amer. Acad. Arts 22: 297. 1887.

Basionym: Sida alata S. Watson Proc. Amer. Acad. Arts 20: 356. 1885
Synonyms: Horsfordia palmeri S. Watson
Treatment appears in FNA Volume 6. Treatment on page 268.

Shrubs, 1–2.5(–4) m, hairs dense, stellate, grayish yellow, rough. Leaves often folded, to 68 mm, petiolate to 8 cm to sessile distally; stipules 2–5 mm; blade ovate to triangular, 1–11.5 cm, base cordate, margins crenate or dentate to denticulate, apex acuminate. Inflorescences solitary flowers, rarely in groups of 3–5. Flowers: calyx campanulate, 3–10 mm; petals rose, pink, or pale lavender, 12–21 mm. Schizocarps 8–12 mm diam.; mericarps 9 or 10, 6–10 mm, sparsely stellate-hairy, lower cell reticulate, upper cell with 2 abortive ovules (rarely developing), wings lanceolate. Seeds 1 per mericarp, brown to blackish, 1.9 mm, minutely scabridulous. 2n = 30.

Phenology: Flowering Sep–Apr.
Habitat: Disturbed and undisturbed sites, deserts
Elevation: 0–600 m


V6 486-distribution-map.jpg

Ariz., Calif., Mexico (Baja California, Baja California Sur, Sonora).


Selected References


Lower Taxa

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