Repository: UIHistories Project: Board of Trustees Minutes - 1884 [PAGE 144]

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148 subglobose or elliptical, epispore very thick, conspicuously and densely tuberculate, the tubercles often united in short irregular ridges 21-36 by 24-45 n9 usually about £0 by 39 ii; spermogonia numerous, scattered or centrally clustered about, nearly black. On Asclepias Cornuti. Occurs on stems, petioles and midribs forming swellings and on both sides of the leaf, being most plentiful on the lower surface. It is very destructive, eating holes in leaves and stems. The spores are very remarkable for size, marking and thickness (5 i±) of epispore. There is a different Mcidium on Asclepias Cornuti, specimens of which were received from E. W. Holway, Decorah, Iowa, labeled M. Jamesianum. M. fraxini, Schw. Hypogenous, occurring especially along the veins and upon the leaf-stalks; spots definite, swollen, often purplish, secidia more or less densely clustered, few or many, elongate, cylyndrical, tardily lacerated, but ultimately deeply split and recurved; spores elliptical, epispore thin, tuberculate, 21-24 by 24-32 /*; spermogonia rather numerous, scarcely elevated, on the upper side of the leaf, scattered over central area of the spot. On Fraxinus viridis. JE. pustulatum, Curt. Hypogenous; spots small, reddish-yellow, thickened; aecidia rather densely crowded, often in a small circle with a vacant center, short, rather finely split and recurved; spores subglobose, inconspicuously tuberculate, 16-1.1 /*.; spermogonia few, yellowish, epiphyllous, difficult to make out. On Gomandra umbellata. JE. eurphorbics, Gmel. Hypophyllous; secidia uniformly scattered over the entire surface short, the narrowly recurved border soon becoming pulverulent; spores subglobose to oblong, often irregular and angular, epihpore rather thick, tuberculate, 12-15 by 15-24 \J.\ spermogonia scattered among the secidia or none, not found on upper side of leaf. On leaves of Euphorbia polygonifolia, E. hypericijolia, E. maculata, and E. dentata. This occurs with Uromyces euphorbia, but genetic connection has not been ascertained for our plants. Persoon is often given as an authority for this name, but in his Syn. Fung. p. 211, he refers to Gmelin as the author. A. euphorbia hypericifolioe, Schw., is probably a synonym. M. crotonopsidis, Burrill. Hypogenous, occurring upon the cotyledons and less commonly on the caudicle and lower leaves; spots distinct, dark colored, the affected cotyledons soon yellow; secidia not numerous, irregularly