. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. :*N2 11 KM A ( >n leaves of Cattlei/a Duiciunn IIjit<-in., imported from Costa Rica, L899. (Fig. 285.) Only a small patch of IJust was present mi the leaf when the plant was received from Costa Rica, but this continued to increase in size and the tailing spores infected other leaves. The uredospores germinated readily, and young Cattleya leaves, inoculated on the under .surface, produced mature uredospores in thirteen days. No success attended the efforts to infect oilier orchids, n
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. :*N2 11 KM A ( >n leaves of Cattlei/a Duiciunn IIjit<-in., imported from Costa Rica, L899. (Fig. 285.) Only a small patch of IJust was present mi the leaf when the plant was received from Costa Rica, but this continued to increase in size and the tailing spores infected other leaves. The uredospores germinated readily, and young Cattleya leaves, inoculated on the under .surface, produced mature uredospores in thirteen days. No success attended the efforts to infect oilier orchids, not belonging to the genus Cattleya. This description is founded on that given in the Kew Bulletin; on referring to the Gardener's (Ihronicle () it will be seen that the particulars there given differ in several respects. The specimen is in the Kew Herbarium. This fungus and the others of the same genus might easily become dangerous parasites in orchid houses, if allowed to spread; though it seems probable, on the slender evidence at present known, that each is confined, like most other Rusts, to a single genus, if not species. Hemileia Phaji Sydow. Credo I'lit'ji Haciborski, Parasit. Alg. und Pilz. 1900, ii. 32. U. Lynchii Adams, Irish Naturalist, 1911, xx. 68. Hemileia Phaji Sydow, Monogr. iii. (ined.). Grove, Journ. Bot. 1913. p. Y,j. 286. H. Phaji. a, epidermis, showing fascicle of uredospores emerging from a stoma, x 180 ; b, the same in section ; c, uredospores, x 600 ; d, a portion of a leaf, with uredo-sori, in Herb. Kew, x ^. Uredospores. Sori hypophyllous, densely scattered, round, distinct, formed of little dense fascicles of hyphae (20—25) which issue through a stoma; pedicels divergent, clavate up- wards, each surmounted by a spore; spores subglobose or rarely. 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 resem
Size: 2079px × 1202px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
