. The British rust fungi (Uredinales) their biology and classification. Rust fungi. APPENDIX HEMILBIA Berk, et Broome. ^cidia, if any, unknown. Uredospores borne singly on hyphae which protrude in fascicles through a stoma. Teleuto- spores formed later on pedicels in the centre of the same fascicles, one-celled, with apical germ-pore, germinating as in Uromyces. The character given for Hemileia, when only H. vastatrix was known, of having one side of the uredospore smooth, is now known to be not of universal application. Hemileia americana Mass. Hemileia americana Mass. in Gard. Chron. 1905, x
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. APPENDIX HEMILBIA Berk, et Broome. ^cidia, if any, unknown. Uredospores borne singly on hyphae which protrude in fascicles through a stoma. Teleuto- spores formed later on pedicels in the centre of the same fascicles, one-celled, with apical germ-pore, germinating as in Uromyces. The character given for Hemileia, when only H. vastatrix was known, of having one side of the uredospore smooth, is now known to be not of universal application. Hemileia americana Mass. Hemileia americana Mass. in Gard. Chron. 1905, xxxviii. 153, f. 53; Kew Bulletin, 1906, p. 40, with plate. Uredospores. Sori hypophyllous, forming broadly effused pulverulent deep-orange patches, often several centimetres in ex- tent; spores perfectly spherical, shortly stipitate, 24â32/i. diam.; epispore bearing small, rather sparsely scattered, round warts, and with two germ-pores. Teleutospores. Occupying the centres of the heads of uredo- spores, shortly stipitate, colour- less, broadly obovate or turbinate, often with a small obtuse api- pjg 285. H. americana. Tip of cuius, densely verruculose, 30 X Ca«Ze2/aleaf,8howingsori(slightly â ' reduced); a, uredospore, and o, 22â25 fl. teleutospore, x 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. (William Bywater), 1848-1938. Cambridge, University Press
Size: 1503px × 1662px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
