SURVEY OF MINNESOTA. 85 



Gen. Ustilago. Link. 



516. U. carbo. Tul. Corn smut. Autumn. 



517. U. antherarum. Fr. Anther Smut. Lychens, &c. 



518. U. violae. B. & Br. Violet Smut. Violet leaves. August. 



519. U. occulta. Preus. Eye smut. On culms of rye. 



Gen. Uredo. Lev. 



520. U. Quercus. Brand. Oak-leaf Uredo. Sept. 



521. U. bifrons. Grev. Twin-faced Uredo. On Bumex. Aug., Sept. 



Order XVII. iEcidiacei. 

 Gen. iEcidium. Pers. 



522. A. euphorbia?. Pers. Spurge Cluster-Cups. May, June. 



523. A. urticae. B.C. Nettle Cluster-Cups. June. 



Family IV. Hyphomycetes. 

 Order XVIII. Isariacei. 



Gen. Isaria. Fr. 



524. I. arachnophila. Ditm. Spider Isaria. Dead spiders. 



525. I. citrina. P. Lemon-colored Isaria. Decaying fungi. Aug. 



526. I. intricata. Fr. Intricate Isaria. Decaying fungi. Sept. 



Order XIX. Stilbacei. 



Gen. Tubercularia. Tode. 



527. T. granulata. P. Granulate Tubercularia. Dead branches. 



Division II. Sporidiifera. 

 Family VI. Physomycetes. 

 Order XXIV. Mucorini. 



Gen. Ascophora. Tode. 



528. A. elegans. Corda. Elegant Ascophora. Fowls' dung. 



Gen. Mucor. Mich. 



529. M. ramosus. Bull. Branched Mucor. Decaying fungi. Aug. 



530. M. Mucedo. L. Common Mucor. Decaying fruits. 



531. M. caninus. P. Dog's dung Mucor. Dung of dogs. 



