Onopordon polycephalum
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Read about Onopordon polycephalum in the Standard Cyclopedia of Horticulture
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Onopordon polycephalum, Boiss. A densely tomentose, tall- stemmed biennial with grooved sts. and a many-headed corymb of showy fls.: Lvs. somewhat lobed. spiny- margined, diminishing in the infl.: involucral bracts pale, all erect, lanceolate.
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
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