. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 368 THECOPSORA summit with a pore; spores elongated-ellipsoid or clavate, provided with distant and pointed warts, yellowish, 26—35 x 14—16/a; epispore rather thick, without perceptible germ- pores. [Teleutospores. Sori hypophyllous, adjoining the uredo-sori, inconspicuous, flat, subepidermal, forming an even layer of laterally united cells; spores columnar or oblong, 24—28x10—12 ya; epispore colourless, uniformly thin (1 /j.)— (description after Dietel).] Fig. 275. p. Pyroiae. ^^ Pyrola minor, P. rotundifolia.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 368 THECOPSORA summit with a pore; spores elongated-ellipsoid or clavate, provided with distant and pointed warts, yellowish, 26—35 x 14—16/a; epispore rather thick, without perceptible germ- pores. [Teleutospores. Sori hypophyllous, adjoining the uredo-sori, inconspicuous, flat, subepidermal, forming an even layer of laterally united cells; spores columnar or oblong, 24—28x10—12 ya; epispore colourless, uniformly thin (1 /j.)— (description after Dietel).] Fig. 275. p. Pyroiae. ^^ Pyrola minor, P. rotundifolia. May Uredospores, on P. —October, uredospores only; Scotland, rotundifolia. ^^^^^^^^ ^^^_ ^j,.^_ 275.) Teleutospores have been met with by few observers ; previous to their discovery, it was uncertain in what genus the fungus should be placed. It may possibly be hetercecious. The uredospores are often more coarsely warted at one end, though this is not invariably the case. Fischer figures the cells of the peridium round the pore as furnished above with pointed warts, of which one is distinctly longer than the others : those cells are enormously thickened on the lower wall. Distribution: Europe, North ilmerica. THECOPSORA Magnus. Hetercecious or secidia unknown. Teleutospores intracellular, occupying and filling the epi- dermal cells of the leaves, united into a brown crust, other characters as in Pucciniastr'um. Uredo as in Pucciniastrum. iEcidia hemispherical, with a thick brown peridium (so far as known); secidiospores verrucose, with a narrow, thin, smooth strip down one side (? always). 1. Thecopsora Padi nov. comb. Licea strobilina A. et S. C'onsp. p. 109, pi. 6, f. 5. Phelonitis strobilina Pers.; Cooke, Handb. p. 409, f. 141. Purichaena strobilina Fr. ; Greville, Scot. Cr. Fl. pi. ilb. yEHdium strohilimim Wint. Pilze, p. 260; Plowr. Ured. p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
Size: 1682px × 1486px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
