Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Keess. The aecidiospores may be found on the lower surface of young needles of silver fir; the aecidia are yellow elongated cushions situated on either side of the needle mid-rib, and are without peridia. Pycnidia (spermogonia) are pro- duced before the aecidia. The mycelium is septate and intercellular with few haustoria. I have found the fungus fairly
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Keess. The aecidiospores may be found on the lower surface of young needles of silver fir; the aecidia are yellow elongated cushions situated on either side of the needle mid-rib, and are without peridia. Pycnidia (spermogonia) are pro- duced before the aecidia. The mycelium is septate and intercellular with few haustoria. I have found the fungus fairly abundant on the Alps and in the Danube valley near Passau. Teleutospores are unknown. Caeoma deformans (Berk, et Br.) Tubeuf {Uromyces deformans Berk, et or Caeoma Asanuro Shirai). This induces the formation of ' witches' brooms ' or of antler-like Fig. 253.—Cii'oma nl/atlx pnctinalat. Needle of Silver Fir showing Caco/Ha-patches on the lower surface, (v. Tubeuf del.) Fig. 254.—Cafoma dijonnang on Thxiiopxis dolabrata. (v. Tubeuf phot, from dried material presented by Prof. Grasmanu of Tokio.) 1 Reess, Rostpihformen, 1869. Berkeley, 'The fungi collected during the expedition of lenger.'' Jour, of Linnean Soc, xvi., 1876. •'Shirai, Botanical Magardne, Tokio, 1889. 'Glial-
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