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FNA | Family List | FNA Vol. 6 | Malvaceae | Sphaeralcea

14. Sphaeralcea laxa Wooton & Standley, Bull. Torrey Bot. Club. 36: 108. 1909.

Caliche globemallow Caliche globemallow

Sphaeralcea incana Torrey ex A. Gray var. dissecta A. Gray; S. ribifolia Wooton & Standley

Plants perennial. Stems ascending, (2–)4–7(–9) dm, densely gray- or white-tomentose. Leaf blades gray or white, broadly ovate-deltate, 3-lobed or 3- or 5-parted, (1–)1.5–5 cm, not rugose, base typically distinctly truncate (to cordate), margins crenate, surfaces stellate-pubescent. Inflorescences paniculate, open, few-flowered, individual flowers widely spaced, tip not leafy; involucellar bractlets red to purple. Flowers: sepals 7–11 mm; petals red-orange, 12–18 mm; anthers usually purple. Schizocarps truncate-ovoid; mericarps 11–16, 4–6 × 2–3 mm, thin-walled, papery, nonreticulate dehiscent part 55–65% of height, tip acute-cuspidate, cusp 1 mm, indehiscent part not wider than dehiscent part, sides prominently, finely reticulate with ± transparent areolae. Seeds 2 or 3 per mericarp, gray, pubescent. 2n = 10, 20.

Flowering early spring–late fall. Rock outcrops and caliche; 600–1900 m; Ariz., N.Mex., Tex.; Mexico (Sonora).


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