Comprehensive Description
provided by North American Flora
Cintractia externa (Griff.) Clinton, Jour. Myc. 8 : 142. 1902
Tilletia externa Griff. Bull. Torrey Club 29 : 290. 1902.
Sori in the ovaries, subspherical, about 3 or 4 mm. in diameter, forming a firmly agglutinated black spore-mass that on absorbing moisture becomes smeared over adjacent parts, with evident small columella; spores bla^k-brown, opaque, ovoid to spherical, smooth, provided with hyaline membranes of which the thin inner is formed by part of cellwall and the outer by the evident remains of the fertile hypha, 17-22 ," in diameter.
On CypEraceae :
Carex filifolia, Montana, Nebraska, Wyoming. Type locality : Burnett's ranch, near Buffalo, Wyoming, on Carex Jihfolia. Distribution : Montana, Wyoming,and Nebraska.
- bibliographic citation
- George Perkins Clinton. 1906. USTILAGINALES; USTILAGINACEAE, TILLETIACEAE. North American flora. vol 7(1). New York Botanical Garden, New York, NY
