Silphium

Plant Characteristics
Origin:	✈	?

Cultivation

Exposure:	☼	?"?" is not in the list (sun, part-sun, shade, unknown) of allowed values for the "Exposure" property.
Water:	◍	?"?" is not in the list (wet, moist, moderate, dry, less when dormant) of allowed values for the "Water" property.

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 The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

Cultivation

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