. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 206 PUCCINI A oblong i" clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90x20—35 yu. (or even 100yu, long); pedin-Is hyaline, per- sistent, very long, (reaching 160 /*). On Buxu8 8emperviren8. Rather common. September, October, lasting through the winter and following spring. (Fig. 153.) The spores of this species easily fall apart into their component cells. Ed. Fischer proved that it has only the one spore-form : he gives (
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 206 PUCCINI A oblong i" clavate, rounded above and not thickened, evidently constricted, usually attenuated below, smooth, brown, 55—90x20—35 yu. (or even 100yu, long); pedin-Is hyaline, per- sistent, very long, (reaching 160 /*). On Buxu8 8emperviren8. Rather common. September, October, lasting through the winter and following spring. (Fig. 153.) The spores of this species easily fall apart into their component cells. Ed. Fischer proved that it has only the one spore-form : he gives () figures showing the effect upon the leaf of an infection by the basidiospores. Accord- ing to him, the teleutospores germinate in spring, and infect the delicate young leaves. The mycelium grows slowly. During the summer and autumn the infected spot becomes much thickened : the sori are produced in late autumn or during the following winter. This is exactly in accordance with the suggestion made by Plowright (), without any experi- mental evidence being; at that time Fig. 153. P. Teleutospores. I Distribution : Europe and Persia. ; Grevillea, ii. 47, 137 and iii. pi. 35, pi. 49, f. 1. Plowr. Ured. p. 212. Sacc. Syll. vii. 686. Sydow, Monogr. i. 476. Fischer, Ured. Schweiz, p. 313, f. 227. McAlpifle, Rusts of Australia, p. 178, f. 99, 100, 123—130, and pi. F, f. 28. Teleutospores. Sori hypophyllous or amphigenous, and on the petioles and stems, on conspicuous yellow or orange spots, scattered but close together, small, hemispherical or on the stems elongated, pulvinate, compact, hard, at first pale-reddish, then reddish-brown; spores oblong to subfusoid, attenuated at both ends or rarely rounded above, thickened at the apex, gently constricted, smooth, yellowish-brown, 35—75 x 12—26 //.; pedicels hyaline, persistent, short or as much as 150/x long; ne-, three-, or even four-celled spores also Please note that these images are extracted
Size: 1053px × 2373px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
