. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Eeess.^ 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 t
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 418 UREDINEAE. Caeoma. Caeoma abietis-pectinatae Eeess.^ 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 Br.^ or Caeoma Asanuro Shirai).^ This induces the formation of " witches' brooms " or of antler-like Fig. 253.—Caeoma abietis pecti7iatae. Needle of Silver Fir showing on the lower surface, (v. Tubeuf del.). Fig. 254.—Caeoma dejoinnans on Thuiopsis dolabrata, (v. Tubeuf phot, from dried material presented by Prof. Grasmann of Tokio.) 1 Reess, Rostpihformen, 1869. ^Berkeley, "The fungi collected during the expedition of 'Chal- lenger.'" Jour, of Linnean Soc, xvi., 1876. 3 Shirai, Botanical Magazine, Tokio, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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