Nicholas Hind, Christabel King
Summary Heterotheca camporum (Greene) Shinners (Compositae: Astereae: Chrysopsidinae) is described and illustrated. Notes are provided for the species' cultivation, propagation, likely pests and diseases, and availability. A full synonymy is given, along with type citations and known presence of type material, together with relevant notes. Selected illustrations of the species are cited, and statements of the species' distribution, habitat and ecology, phenology, etymology, conservation status and vernacular names provided. The Wakehurst plants vary considerably in capitulum size, but critical morphological characters are identical, placing the material in Heterotheca camporum var. camporum , one of the Western Goldenasters. There are currently two concepts of the infrageneric division of Heterotheca Cass. Semple's, used in the Flora of North America , would place our material in Heterotheca sect. Phyllotheca (Nutt.) Harms. In contrast, Nesom's more recent sectional concept restricts sect. Phyllotheca to the western seaboard of the United States; more specifically he considered the section essentially Californian. Nesom placed our species, one of 49, in sect. Chrysanthe G.L. Nesom; our species belongs in the Heterotheca villosa group or complex. Heterotheca camporum is easily confused with Chrysopsis mariana (L.) Elliott, the name on the accession of this material in the North American Prairie plantings at Wakehurst; it has historically been confused with this species in Illinois, and probably elsewhere.