. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. K)2 UROMYi ES On leaves of Phaseolus vulgaris. .May. .Inly—October: even earlier on forced plants, Uncommon. (Fig. 55.) De Bary proved the genetic connection of the aecidia with the uredo- and teleutospores. The aecidia are rarely met with; they may occur either before or in company with the other spore-forms. 1 have seen no proof that they have been found in this country. The description i- founded upon that of Sydow. Fischer says that this species is rery common in Switzerland on Phaseol
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. K)2 UROMYi ES On leaves of Phaseolus vulgaris. .May. .Inly—October: even earlier on forced plants, Uncommon. (Fig. 55.) De Bary proved the genetic connection of the aecidia with the uredo- and teleutospores. The aecidia are rarely met with; they may occur either before or in company with the other spore-forms. 1 have seen no proof that they have been found in this country. The description i- founded upon that of Sydow. Fischer says that this species is rery common in Switzerland on Phaseolus; it may become a dangerous pan on forced Beans. All affected plants (leaves and stems should be burnt. /'. appendiculatus of Sydow, which nany Leguminosie, is probably a collective species, though no experiments bearing on this point are available. Distribution: as a collective species (U. appendiculatus) world-wide. 16. Uromyces tuberculatus Fckl. /Ecidiwm Eupkorbiae Gmel. in Linn. Syst. Nat. ii. 1473 Purton, Midi. Flor. iii. 293. Cooke, Handb. p. 537 ; Micr. Fung. p. 195 Plowr. Ured. p. 270. Uromyces excavatus DC; Cooke, Grevillea. ii. 161 ; Micr. Fung. p. 213. U. tuberculatus Fckl. Symb. Myc. p. 64. Sydow, Monogr. ii. 165. Fischer, Ured. Schweiz, p. 43, f. 33. U. proeminens Lev. ; Sacc. Syll. vii. 553 Hypophyllous, spread uniformly over the Spermogones I uEcidiospores whole leaf; secidia immersed, cup-shaped, with a short denticu- late margin; spores orange, densely verruculose, 17—25 x 14— 20 fi. Uredospores. Sori hypophyllous. scattered, at length naked, cinnamon ; spores more or less globose, yellowish-brown, aculeo- late,20—25/x: epispore 1^—2^/la thick, with 5—7 swollen germ- pores (4—5, Fischer). Teleutospores. Sori amphi- genous and on the stems, round, scattered or sometimes arranged in little groups, pulverulent, blackish-brown or black: spores globose to ellipsoid, occasionally. Fig. 56. U. tuberculatus. Two ma- ture teleutos
Size: 2286px × 1093px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
