. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. AUTOBASIDIOMYCETES 451 In the case of the potato, it forms a membranous layer inclos- ing the stem for several inches above the surface of the ground. This layer is composed of rather loosely interwoven hyphae, and on account of this character it is difficult to say if the plant is properly placed under the genus Corticium, or whether it might not with equal propriety be considered a species of Hypochnus. The basidia are short, cylindrical, or oblong, and apparently many. Fig. 222.
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. AUTOBASIDIOMYCETES 451 In the case of the potato, it forms a membranous layer inclos- ing the stem for several inches above the surface of the ground. This layer is composed of rather loosely interwoven hyphae, and on account of this character it is difficult to say if the plant is properly placed under the genus Corticium, or whether it might not with equal propriety be considered a species of Hypochnus. The basidia are short, cylindrical, or oblong, and apparently many. Fig. 222. Corticium vagum var. Solani a, young hyphae ; &, cells from growth in tufts ; c, basidia and spores may be produced from a single parent hypha, each basidium being cut off from the hypha by a septum placed in the manner charac- teristic of the branching mycelium. The basidia bear four sterig- mata and spores, although commonly only two may be observed at one time. The spores, according to Rolfs, are somewhat ellip- tical or irregular in outline, frequently obovate and nearly hyaline, 9-15 X 6—13 fi. Spore germination proceeds in ordinary nutri- ent media, and as a rule a septum is formed in the germ tube shortly after it emerges from the spore, the proximal portion of the germ tube being somewhat less in diameter. When produced. 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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Keywords: ., bookauthorduggarbe, bookcentury1900, bookdecade1900, bookyear1909
