325. Haploësthes A. Gray, Mem. Amer. Acad. Arts, n. s. 4: 109. 1849.
[Greek haploos, simple, and esthes, raiment]
John L. Strother
Perennials or subshrubs, 10–80 cm (± succulent). Stems erect to sprawling, branched from bases or throughout. Leaves cauline; opposite; sessile; blades filiform to linear, margins entire, faces glabrous or glabrescent. Heads radiate, (5–25) in corymbiform arrays. Involucres obconic, 2.5–5+ mm diam. Phyllaries persistent, 4–5 in 1 series (lance-elliptic to ovate or orbiculate, membranous to subscarious). Receptacles convex, epaleate. Ray florets 3–6, pistillate, fertile; corollas yellow. Disc florets 18–30(–60)[–100+], bisexual, fertile; corollas yellow, tubes shorter than or equaling cylindric or funnelform throats, lobes 5, deltate to lance-deltate. Cypselae ± cylindric (10–15-ribbed); pappi persistent, of 20–25+ barbellulate bristles. x = 18.
Species 3 (1 in the flora): sw United States, Mexico.
SELECTED REFERENCE
Turner, B. L. 1975. Taxonomy of Haploësthes (Asteraceae–Senecioneae). Wrightia 5: 108–115.
