Silphium


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Plant Characteristics
Lifespan: perennial
Cultivation
Scientific Names

Asteraceae >

Silphium >


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Plant Characteristics
Origin: ?
Cultivation
Exposure: ?"?" is not in the list (sun, part-sun, shade, unknown) of allowed values for the "Exposure" property.
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Scientific Names



Read about Silphium in the Standard Cyclopedia of Horticulture 

Silphium (from the Greek name of an umbelliferous plant of northern Africa). Compositae. Rosinweed. Tall-growing hardy perennial herbs native of the United States which are grown for their rather large sunflower-like heads of flowers which, except in one species, are yellow.

Leaves opposite, alternate or verticillate, often forming water-holding cups by perfoliation of the st.: heads many-fld.; involucre of thick, somewhat foliaceous bracts; ray-fls. or at least their ovaries in more than 1 series, fertile, and with elongated exserted deciduous ligules: achenes much flattened, falling free or only with the subtending bract.—About 25 species. Silphiums are of easy cult. in any good soil. They require full sunlight and are prop. by division or seed. CH


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