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Urospermum
Family: Asteraceae
Urospermum image
Zachery Berry
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John L. Strother in Flora of North America (vol. 19, 20 and 21)
Annuals [perennials], 10-40(-60+) cm; taprooted. Stems usually 1, erect, branched distally, setose to hispid or glabrous [pilosulous]. Leaves mostly cauline (at flowering) [mostly basal]; proximal ± petiolate, distal sessile; blades of the proximal mostly obovate to oblong-obovate, usually pinnately lobed or dentate, distal ovate to linear (bases often clasping), ultimate margins dentate or entire (veins often setose on abaxial faces). Heads borne singly or in loose, corymbiform arrays. Peduncles little, if at all, inflated distally, rarely bracteate. Calyculi 0. Involucres ± urceolate, 10-20+ mm diam. Phyllaries 7-8(-12+) in 1(-2) series, ovate-lanceolate to lance-linear (basally connate), subequal, margins scarious, apices acuminate. Receptacles flat to convex, pitted, hispid, epaleate. Florets 20-50+; corollas yellow, sometimes striped abaxially with red. Cypselae brown, bodies flattened-oblong, ± tuberculate, faces glabrous or scabrellous, beaks proximally dilated and tuberculate, distally acuminate and scabrous to scabrellous; pappi readily falling, of 18-22+ white [buff to rufous], subequal, plumose bristles in 1(-2) series (basally connate, falling together). . = 5, 7-.
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Urospermum dalechampii
Image of Urospermum dalechampii
Urospermum echioides
Images
not available
Urospermum picroides
Image of Urospermum picroides
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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