. The fungi which cause plant disease . Plant diseases; Fungi. 162 THE FUNGI WHICH CAUSE PLANT DISEASE Ascocarps scattered on the leaf, shining black, up to 1 mm. long; asci clavate, 8-spored; spores nearly as long as the ascus, 90-120 X M- Conidia cylindric, hyaline, continuous, 6-8 x 1 /t. L. brachysporum Rost. Perithecia epiphyllous; asci cylindric, short- stalked, apex rounded, 120 x 20-25 p., 8- spored; paraphyses bacillar, apex curved; spores oblong, l-rowed, hyaline, 28-30 x 9-10 /x. It is common on pine leaves.^ Several other species are parasitic upon various conifers, among them:
. The fungi which cause plant disease . Plant diseases; Fungi. 162 THE FUNGI WHICH CAUSE PLANT DISEASE Ascocarps scattered on the leaf, shining black, up to 1 mm. long; asci clavate, 8-spored; spores nearly as long as the ascus, 90-120 X M- Conidia cylindric, hyaline, continuous, 6-8 x 1 /t. L. brachysporum Rost. Perithecia epiphyllous; asci cylindric, short- stalked, apex rounded, 120 x 20-25 p., 8- spored; paraphyses bacillar, apex curved; spores oblong, l-rowed, hyaline, 28-30 x 9-10 /x. It is common on pine leaves.^ Several other species are parasitic upon various conifers, among them: L. macrospo- rium (Hart.) Rehm, on spruce leaves, in Europe and America; L. nervisequum (D. C.) Rehm, on fir leaves, a very destructive European species; the pycnidial stage is Septoria pini Fuckel; L. juniperinum (Fr.) s^°"^After R^m''^' ^ ^°*' °^ juniper leaves and twigs in Europe and America; L. gilvum Rost., on pines; L. abietis Rost., on spruce leaves; L. laricinum Duby, on larch. The last four species are Fig. 114.—L. pinastri. H, habit sketch; J, Dichsenaceae (p. 160) This family contains the single genus Dichsena. Dichsena Fries Apothecia grouped in rounded spots; at first sunken, then erumpent, rounded or elon- gate, dark brown; asci irregularly pyriform, 4 to 8-spored; spores eUipsoidal, at first 1-celled, ^^^^^ at maturity multicellular; paraphyses filiform, pm ns^l^^erium Some seven species are found upon various maerosporum. Af- trees. terHartig. D. quercina Fr. causes rough black patches on bark of young oaks in Europe and America; D. faginea Fr., a similar, effect on 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
Size: 872px × 2866px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
