Eremalche rotundifolia

(A. Gray) Greene

Leafl. Bot. Observ. Crit. 1: 208. 1906.

Common names: Desert five-spot
Basionym: Malvastrum rotundifolium A. Gray Proc. Amer. Acad. Arts. 7: 333. 1868
Synonyms: Sphaeralcea rotundifolia (A. Gray) Jepson
Treatment appears in FNA Volume 6. Treatment on page 247.

Plants erect; main stem unbranched or branched from base, spotted or flushed purple-maroon, 8–30(–60) cm, sparsely or densely hairy, hairs mostly simple, bristly, to 3 mm. Leaf blades unlobed, 1.5–6 cm, margins crenate-dentate. Inflorescences usually exceeding leaves. Pedicels 1.5–8 cm; involucellar bractlets filiform, 6–10 mm. Flowers: calyx 9–14 mm, lobes 5.5–11 × 3.5–7 mm; petals rose-pink to lilac, magenta-spotted at base, (15–)20–30 mm, exceeding calyx. Mericarps 25–36, black, waferlike edges acute, reticulate, 2.8–3.5 mm. 2n = 20.

Phenology: Flowering mid winter–late spring.
Habitat: Dry desert scrub
Elevation: ?50–1200 m


V6 446-distribution-map.jpg

Ariz., Calif., Nev., Utah, Mexico (Baja California, Sonora).


Eremalche rotundifolia is morphologically and perhaps generically distinct from the other species of Eremalche; it occurs widely in the Mojave and Sonoran deserts and in Death Valley.

Selected References


Lower Taxa

... more about "Eremalche rotundifolia"
David M. Bates +, Malvastrum A. Gray subsect. Pedunculosa A. Gray in A. Gray et al. +, Syn. Fl. N. Amer. 1(1 +  and 2): 308. 1897 +
(A. Gray) Greene +
Malvastrum rotundifolium +
Desert five-spot +
Ariz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California +  and Sonora). +
?50–1200 m +
Dry desert scrub +
Flowering mid winter–late spring. +
Leafl. Bot. Observ. Crit. +
Illustrated +
Sphaeralcea rotundifolia +
Eremalche rotundifolia +
Eremalche +
species +