Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 400 DISEASES OF CULTIVATED PLANTS Most closely allied to Hypochtius, differing in being parasitic, with immersed mycelium, and in the basidia bearing a variable number of spores. Rhododendron galls {Exobasidium rhododetidri. Cram.) form on the living leaves of Rhododendron /lirsuium, R. fer- rugineum, R. li'ilsonianufn, etc., and vary in size from Fig. 125.—Exobasidium rhododendri, on leaves of rhododendron, slightly reduced ; 2. basidia and spores of same, highly mag ; 3, Hy
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 400 DISEASES OF CULTIVATED PLANTS Most closely allied to Hypochtius, differing in being parasitic, with immersed mycelium, and in the basidia bearing a variable number of spores. Rhododendron galls {Exobasidium rhododetidri. Cram.) form on the living leaves of Rhododendron /lirsuium, R. fer- rugineum, R. li'ilsonianufn, etc., and vary in size from Fig. 125.—Exobasidium rhododendri, on leaves of rhododendron, slightly reduced ; 2. basidia and spores of same, highly mag ; 3, Hypochnus solani on lower part of a potato haulm, slightly reduced ; 4. mycelium and basidia of Hypochnus, highly mag. a pea to that of a cherry. These are at first pale green, at length often becoming red or brownish. When full grown the surface is covered with a delicate whitish bloom, due to the presence of innumerable minute conidia, produced by budding in a yeast-like fashion from the basidiosi)ores. The mycelium is very al)undant between the cells at the jeriphery of the gall, but scanty elsewhere. .Small globose haustoria are present in the cells of the host. Basidia covering the surface of the galls, clavate, sterigmata
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