. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. CRYPTOMYCES 259 Bark fungus {Tyftipanis conspersa. Fries.) often occurs on living bark of birch and poplar. Ascophores top-shaped, 20-40, springing from a stroma, closed at first, then exposing the black disc, margin sprinkled with a little white meal at first, wall of ascus thick, spores numerous, 1-2X0'5 /x. Spermogonia in minute conceptacles of the stroma, usually. 1^ ^t' 2> Fig. jb. — Tympanisconspcrsa. i, gi'oup of fungi on wood. 2, section of sa
. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. CRYPTOMYCES 259 Bark fungus {Tyftipanis conspersa. Fries.) often occurs on living bark of birch and poplar. Ascophores top-shaped, 20-40, springing from a stroma, closed at first, then exposing the black disc, margin sprinkled with a little white meal at first, wall of ascus thick, spores numerous, 1-2X0'5 /x. Spermogonia in minute conceptacles of the stroma, usually. 1^ ^t' 2> Fig. jb. — Tympanisconspcrsa. i, gi'oup of fungi on wood. 2, section of same; 3, ascus containing numerous spores; 4, spores ; 5, conidia. Figs. 2-5 mag. mixed with the ascophores, 0-5-1 spermatia cylindrical, 2-5 x A variety called wr?//(Rehm.), having fewer ascophores, 4-10 in a cluster, occurs on bark of apple, hawthorn, mountain- ash, and other rosaceous plants. CRYPTOMYCES (Grev.) Ascophores immersed in a white stroma covered by the blackened epidermis which is firmly united to the black crust of the stroma, finally opening by long cracks ; asci cylindrical, 8-spored; spores continuous, hyaline, elliptical. Forming large black patches on branches, superficially resembling Rhyiisma, differing in the spores and white 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 Massee, George, 1850-1917. New York : Macmillan
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
