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FNA | Family List | FNA Vol. 6 | Malvaceae

22. Eremalche Greene, Leafl. Bot. Observ. Crit. 1: 208. 1906.

Desert mallow [Greek eremia, desert, and alkea, mallow, alluding to habitat] Desert mallow [Greek eremia, desert, and alkea, mallow, alluding to habitat]

David M. Bates

Malvastrum A. Gray subsect. Pedunculosa A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(1,2): 308. 1897

Herbs, annual, sometimes gynodioecious. Stems prostrate to erect, sparsely to densely hairy. Leaves: stipules caducous, subulate; blade reniform-round, unlobed or palmately 3-, 5-, [7-]cleft, base truncate to cordate, margins usually toothed, sometimes entire. Inflorescences axillary, solitary flowers in lower axils, congested and ± corymbose at branch tips; involucellar bractlets persistent, 3, distinct. Flowers: calyx not accrescent, not inflated, lobed to beyond middle, lobes not ribbed, acuminate; corolla campanulate, white to rose, lavender, or mauve, drying purple or blue; staminal column included; ovary 9–36-carpellate; ovules 1 per carpel; styles 9–36-branched (branches equal in number to carpels); stigmas terminal, capitate. Fruits schizocarps, oblique, not inflated, depressed-discoid, edge corrugate or reticulate, glabrous; mericarps 9–36, drying black, 1-celled, without spur, ± spheric, unarmed, lateral walls ± disintegrated, indehiscent. Seeds ascending, 1 per mericarp, black, obovoid-reniform, glabrous. x = 10.

Species 3 (3 in the flora): sw United States, nw Mexico.

1 Leaf blades unlobed; petals magenta-spotted at base; mericarps 2.8–3.5 mm.   1 Eremalche rotundifolia
+ Leaves lobed or parted; petals not spotted; mericarps 1.4–1.8 mm   (2)
2 (1) Flowers bisexual; petals 4–5.5 mm, ± equaling calyx; plants prostrate to decumbent.   2 Eremalche exilis
+ Flowers bisexual or pistillate; petals 5.5–20(–25) mm, equaling or exceeding calyx; plants erect, main stem unbranched or with ascending branches from base.   3 Eremalche parryi

Lower Taxa


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