Comprehensive Description
provided by North American Flora
Nigredo silphii (Burrill) Arthur
Aecidium compositarum Silphii Burrill ; De-Toni, in Sacc. Syll. Fung. 7 : 798. 1888 Aecidium Silphii Sydow, Ured. 1546. 1901. Uromyces Silphii Arth. Jour. Myc. 13 : 202 1907. Uromyces Junci-le?iuis Sydow, Monog. Ured. 2 : 289. 1910.
Pycnia chiefiy epiphyllous, in small groups, golden-brown, subglobose, 80-100 ju broad by 80-110 /n high ; ostiolar filaments hyaline, free, up to 65 ju long.
- bibliographic citation
- Joseph Charles Arthur, Frank Dunn Kern. 1912. (UREDINALES); AECIDIACEAE (continuatio), GYMNOSPORANGIUM. North American flora. vol 7(3). New York Botanical Garden, New York, NY
