Cronartium comptoniae Arthur 1906

Cronartium comptoniae Arth. Bull. Torrey Club 33: 29. 1906
O and I. Pycnia and aecia unknown.
Uredinia hypophyllous, scattered, or somewhat gregarious, round, very small, about 0.1 mm. across, dehiscent by a central rupture, soon wide open and naked, pulverulent ; peridium rather firm, cells polygonal, at the sides with walls uniformly thin, about 1//, at the top with the inner walls greatly thickened, up to 10/* ; urediniospores oval or obovate, 16-21 by 23-31 /* ; wall colorless, rather thick, 2.5 /*, sparsely and finely echinulate.
Telial columns hypophyllous, filiform, 40-100/* thick, 0.5-2 mm. long; teliospores fusiform-oblong, 13-17 by 28-56/*, obtuse at both ends; walls nearly colorless, smooth,
thin, 1-1.5/*.
On Myricaceae :
Comptonia peregrina (I,.) Coult. (C. asplenifolia Gaertn., Myrica asplenifolia Endl,), Connecticut, Massachusetts, New Jersey, New York, North Carolina, Vermont.
Myrica Gale I,., Maine ; Ontario. Type locality : Egg Harbor, I^ew Jersey on Comptonia peregrina. Distribution : Atlantic coast from Noi ih Carolina northward into Canada.