Difference between revisions of "Chrysactinia"

A. Gray

Mem. Amer. Acad. Arts, n. s. 4: 93. 1849.

Etymology: Greek chrysos, gold, and actinos, ray
Treatment appears in FNA Volume 21. Treatment on page 232. Mentioned on page 222.
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|tribe=Asteraceae tribe Heliantheae
 
|tribe=Asteraceae tribe Heliantheae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae

Latest revision as of 20:13, 5 November 2020

Subshrubs or shrubs, 10–40[–80] cm (evergreen). Stems erect, strictly branched. Leaves cauline; mostly alternate [opposite]; blades simple [pinnate], linear to clavate or acerose (± fleshy), margins entire, faces usually glabrous, sometimes puberulent (oil-glands marginal or submarginal). Heads radiate, borne singly. Calyculi 0. Involucres turbinate to hemispheric, 3.5–5[–8] mm diam. Phyllaries persistent, 8–14 in ± 2 series (distinct to bases, linear to lance-linear [ovate], carinate, each usually bearing 1–5 oil-glands). Receptacles convex to hemispheric, ± pitted, rarely paleate (paleae readily falling). Ray florets 8(–13), pistillate, fertile; corollas bright yellow. Disc florets 15–70, bisexual, fertile; corollas yellow to orange, tubes much shorter than cylindro-funnelform throats, lobes 5, lance-deltate. Cypselae cylindric to fusiform, strigillose or glabrescent; pappi persistent, of [20–]30–40 bristles in ± 1 series. x = 15.

Distribution

sw United States, Mexico.

Discussion

Species 5 (1 in the flora).