Parthenium
-
Authority
Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
-
Family
Asteraceae
-
Scientific Name
-
Description
Description - Erect, mostly pubescent or caneseent herbs, or shrubs, with alternate leaves, and small corymbose or paniculate heads of both tubular and radiate white or yellow flowers. Involucre broadly campanulate or hemispheric, its bracts imbricated in 2 or 3 series, obtuse, appressed, nearly equal. Receptacle convex or conic, chaffy, the chaff membranous, surrounding the disk-flowers. Ray-flowers about 5, pistillate, fertile, their ligules short, broad, 2-toothed or obcordate. Disk-flowers perfect, sterile, their corollas 5-toothed, the stylo undivided. Anthers entire at the base. Achenes compressed, keeled on the inner face, margined, bearing the persistent rays on the summit. Pappus of 2-3 scales or awns. [Greek, virgin.] About 10 American species. Type species: Parthenium Ilysterophonis L.