Comprehensive Description

provided by North American Flora
Coleosporium arnicale Arthur, sp. nov
O and I. Pycnia and aecia unknown.
Uredinia hypophyllous, gregarious or scattered, large, 1 mm. or less in diameter, soon naked, orange-yellow, ruptured epidermis barely noticeable ; urediniospores elliptical or globoid, 22-27 by 23-33// ; wall rather thick, 2-3//, closely and finely verrucose with deciduous tubercles.
bibliographic citation
Joseph Charles Arthur. 1907. UREDINALES; COLEOSPORIACEAE, UREDINACEAE, AECIDIACEAE (pars). North American flora. vol 7(2). New York Botanical Garden, New York, NY
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