. The fungi which cause plant disease . Plant diseases; Fungi. 278 THE FUNGI WHICH CAUSE PLANT DISEASE Spores muriform Stroma e£Fused Spores hyaline 8. Thyridella. Spores colored 9. Thyridium. Stroma none or pulvinate 10. Fenestella. Valsa Fries (p. 277) Perithecia on a more or less definite stroma, immersed, the ostiole erumpent, black, firm; asci globose to cylindric, often long-pedunculate; spores 1-celled, rarely 2-celled, cylindric, rounded, hya- line or light-brown; pa- raphyses none. V. leucostoma (Pers.). Fr, 12, 229, 280 Fig. 207 -Valsa. A, habit sketch; B, perithecia; C asci. After T
. The fungi which cause plant disease . Plant diseases; Fungi. 278 THE FUNGI WHICH CAUSE PLANT DISEASE Spores muriform Stroma e£Fused Spores hyaline 8. Thyridella. Spores colored 9. Thyridium. Stroma none or pulvinate 10. Fenestella. Valsa Fries (p. 277) Perithecia on a more or less definite stroma, immersed, the ostiole erumpent, black, firm; asci globose to cylindric, often long-pedunculate; spores 1-celled, rarely 2-celled, cylindric, rounded, hya- line or light-brown; pa- raphyses none. V. leucostoma (Pers.). Fr, 12, 229, 280 Fig. 207 -Valsa. A, habit sketch; B, perithecia; C asci. After Tulasue. Stroma strongly con- vex, 2-3 mm., whitish and granular within, outer layer coriaceous; perithecia immersed; asci fusoid-clavate, subsessile, 35-45 x 7-8 m; spores biseriate, allantoid, hyaline, slightly curved, 9-12 x /i. Conidia (=Cytospora rubescens); stromate, erumpent, reddish; conidia allantoid, 4 /*. On pome and stone fruits throughout Europe, Australia and America causing the disease known as " ; The fimgus was studied by Rolfs '"'• ''* who worked out its life cycle. V. oxystoma Rehm. occurs on Alnus in Em*ope; V. (Eutypa) caulivora Rehm. affects Hevea. V. ambiens Fr. is on the apple in Europe. V. (Eutypella) prunastri (Pers.) Fr. is the cause of serious dis- eases of apples, plums, etc., in England. V. (Eutypa) erumpens Mas. is reported as a wound parasite in the tropics on Ficus, and cacao. Diaporfhe Nitschke (p. 277) Stroma very variable, usually definite; perithecia membranous subcoriaceous, generally pale-cinereous within, with a cylindric or filiform beak; asci fusoid; spores fusoid to subelliptic, 2-celled,. 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 Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
