Ustilago punctata G. P. Clinton 1906

Ustilago punctata Clinton, sp. no v
Sori in the inflorescence more or less involving the whole or confined to the individual flowers and enwrapped by the floral envelopes, rarely developing pustules on the floral leaves, forming a black-purple dusty spore-mass ; spores dark-purple (immature ones often hyaline or tinted), rather irregular, often adhering together somewhat, ovoid to subspherical or not infrequently flattened and irregularly elongate, appearing smooth but under high powers or an immersion lens usually showing very minutely punctate-reticulate, chiefly 13-17 /i, the most elongate rarely 19 ,", in length. On Polygonaceae :
Polygonum. Newberryi^ Washington.
Type collected on Polygonum Newberryi, Mt. Paddo, Washington, at an altitude of about 2200 m., by W. N. Suksdorf, September, 1904. Its distinguisbing character is the punctate-reticulations of the spores that require very high powers for their detection.