. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 212 PUCCINIA 82. Puccinia Ribis DC. Puccinia Ribis DC. Flor. fr. ii. 221. Gard. Chron. 1894, xvi. 136. Trans. Brit. Myo. Soc. i. 57. Saoc. Syll. vii. 679. Sydow, Mbnogr. i. 496. Fig. 159. P. Ribis. Teleutospores and mesospore. Sori epiphyllous, orbicular, surrounded by a discoloured yellow zone, circinate and often confluent, pulverulent, rich chestnut-brown; spores oval or oblong, rounded above and be- low, apex thickened slightly and hooded, hardly constricted, verru- culose or rather punctate
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 212 PUCCINIA 82. Puccinia Ribis DC. Puccinia Ribis DC. Flor. fr. ii. 221. Gard. Chron. 1894, xvi. 136. Trans. Brit. Myo. Soc. i. 57. Saoc. Syll. vii. 679. Sydow, Mbnogr. i. 496. Fig. 159. P. Ribis. Teleutospores and mesospore. Sori epiphyllous, orbicular, surrounded by a discoloured yellow zone, circinate and often confluent, pulverulent, rich chestnut-brown; spores oval or oblong, rounded above and be- low, apex thickened slightly and hooded, hardly constricted, verru- culose or rather punctate, chest- nut-brown, 20—30 X 15—20/i; pedicels hyaline, thin, deciduous, about as long as the spore; a few mesospores intermixed. On leaves of Rihes rubrum. Very rare. Dallas Manse Garden, Elginshire, July 16, 1894 (Rev. Dr Keith). (Fig. 159.) The pore of the lower cell is always towards the base, near the insertion of the pedicel. Eriksson showed that the teleutospores do not germinate until they have passed through the winter. He considers the form on Eibes rubrum as biologically distinct from that on R. nigrum or R. Orossularia. Distribution: Central and Northern Europe, North America. 83. Puccinia SaxifVags Schlecht. Puccinia Saxifragae Schlecht. Flor. Berol. ii. 134. Plowr. Ured. p. 208. Sacc. Syll. vii. 678. Sydow, Monogr. i. 500. Fischer, Ured. Schweiz, p. 151, f. 117. P. Saxifragarum Cooke, Micr. Fung. p. 209 {non Handb. p. 506). Teleutospores. Sori generally hypophyllous, on discoloured spots, round, scattered or aggregated and confluent and then irregular, soon naked, pulverulent, dark-brown; spores ellipsoid or oblong, rounded at both ends or slightly attenuated below, slightly constricted, often surmounted by a rather large pale. 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 Grove, W. B. (Wi
Size: 1762px × 1418px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
