. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are found on CuPRESSiNEiE (ChamcBcyparts, Cupressus, Juniperus, Libocedrus). One autcecious species is G. bermudianum which produces both its aecia and teliaon junipers (7. bermudianum). Kern gives thirty-two species as the number for North America and in vol. 7, North American Flora, part 3, pages 188-190, gives a useful key for the identification of the species. Gymnosporangium botryapites causes fusiform swelling
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are found on CuPRESSiNEiE (ChamcBcyparts, Cupressus, Juniperus, Libocedrus). One autcecious species is G. bermudianum which produces both its aecia and teliaon junipers (7. bermudianum). Kern gives thirty-two species as the number for North America and in vol. 7, North American Flora, part 3, pages 188-190, gives a useful key for the identification of the species. Gymnosporangium botryapites causes fusiform swellings on the white cedar, Chamcecyparis tkyoides, on which swellings the two- to four-. FiG. 79.—Cedar rust on apple, roestelia stage with pustules. (After Jones and Bartholomew, Bull. 257, Agric. Exper. Stat., Univ. Wise, July, 1915.) celled teliospores are formed. The aecia occur on two species of shad bush: Amelanchier canadensis and A. intermedia (Fig. 73). In Gymnosporangium nidus-avis, the telia arise from a perennial myceUum which often dwarfs the young shoots and causes bird's-nest distortions in which usually there is a reversion of the leaves to the juvenile form, sometimes "causing gradual enlargements in isolated areas on the larger branches of Juniperus virginiana with aecia on several species of Amelanchier (Fig. 73). Juniperus communis is the host of the telial stage of G. clavarimforme, which appears on long fusiform swellings of various-sized branches, 14. 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 Harshberger, John W. (John William), 1869-1929. Philadelphia : P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
