Difference between revisions of "Asteraceae (tribe Heliantheae) subtribe Clappiinae"
Phytologia 41: 39. 1978.
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name=Asteraceae (tribe Heliantheae) subtribe Clappiinae | name=Asteraceae (tribe Heliantheae) subtribe Clappiinae | ||
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Clappiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Clappiinae | ||
Latest revision as of 20:13, 5 November 2020
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.
Distribution
sw United States, Mexico.
Discussion
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).
Selected References
None.
Lower Taxa
Key
| 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 |