Asteraceae (tribe Heliantheae) subtribe Clappiinae

H. Robinson

Phytologia 41: 39. 1978

Treatment appears in FNA Volume 21. Treatment on page 251. Mentioned on page 5, 220, 253.
Subshrubs or shrubs, 5–40 cm (often succulent or fleshy). Leaves mostly cauline; opposite (proximal) or distally or mostly alternate; sessile; blades mostly linear to filiform (terete or subterete), margins entire, faces glabrous. Heads radiate, borne singly. Calyculi 0. Involucres hemispheric or obconic. Phyllaries persistent, 12–16 in 2–4+ series (distinct, obovate or ovate to lanceolate or linear, unequal, striate with resinous nerves in Clappia). Receptacles convex, usually epaleate (paleae rarely scattered, subulate scales; receptacles sometimes with setiform or subulate enations). Ray florets 2–11 or 10–15, pistillate, fertile; corollas yellowish or yellow. Disc florets 20–100+, bisexual, fertile; corollas yellowish or yellow, tubes shorter than to longer than funnelform throats, lobes 5, deltate to narrowly lance-ovate; anther thecae pale; stigmatic papillae in 2 lines. Cypselae clavate to columnar (10–12-ribbed, sparsely hairy); pappi persistent, either of 12–25 subulate scales in 1 series, or of ca. 50 bristles or setiform scales in 3–4 series.


sw United States, Mexico.


Genera 2, species 3 (2 genera, 3 species in the flora).

Traditionally, Clappia has been included in Helenieae and Pseudoclappia in Senecioneae. H. Robinson (1981) suggested that the two genera are related to Varilla (Varillinae).



Lower Taxa


1 Ray florets 10–15; pappi of 12–25 subulate scales in 1 series Clappia
1 Ray florets 2–4; pappi of ca. 50 bristles or setiform scales in 3–4 series Pseudoclappia