Anisocoma

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Description

Annuals, 5-25 cm (± scapiform); taprooted. Stems 1-25+, erect or ascending, simple, glabrous or densely tomentose, sometimes glabrescent. Leaves basal or subbasal; petiolate (petioles winged); blades oblanceolate, margins pinnately lobed, denticulate (teeth callose-tipped). Heads borne singly. Peduncles not inflated distally, ebracteate. Calyculi 0. Involucres cylindric to campanulate, 4-20 mm diam. Phyllaries 15-25 in 4-5 series, (centers green to reddish purple) unequal, outer ovate to orbiculate, inner linear to oblong, flat, margins papery-transparent, apices rounded or obtuse to subacute. Receptacles flat to weakly convex, smooth, paleate (paleae slender, bristlelike). Florets ca. 40; corollas cream to bright yellow. Cypselae tan, cylindric, (bases tapered) beaks 0 (or ca. 0.5 mm), 10-15-nerved, finely appressed-puberulent; pappi readily falling, of 10, distinct, white, plumose bristles in 1 series (adaxial usually shorter than abaxial). x = 7.

from: Keil, D. J.: 63. Anisocoma Torrey & A. Gray. – Pp. 309-310 in: Flora of North America Editorial Com. (ed.), Flora of North America 19. – New York / Oxford.

Distribution

Northern America:
Arizona; California; Mexico Northwest (Baja California , Sonora ); Nevada.