. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON COMPOSITE 131 the epidermis and resemble rather a Dothidea or Asteroma than a Puccinia. The spores bear a slight resemblance to those of P. Poarum, but are more fusiform, and much more thickened at the apex. Mixed with them are sometimes a number of mesospores. Distribution : Europe, except the southern Fig. 82. P. Millefolii. spores. Teleuto- 3. Puccinia Millefolii Fckl. Puccinia Millefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Urecl. p. 215. Sydow, Monogr. i. 2.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON COMPOSITE 131 the epidermis and resemble rather a Dothidea or Asteroma than a Puccinia. The spores bear a slight resemblance to those of P. Poarum, but are more fusiform, and much more thickened at the apex. Mixed with them are sometimes a number of mesospores. Distribution : Europe, except the southern Fig. 82. P. Millefolii. spores. Teleuto- 3. Puccinia Millefolii Fckl. Puccinia Millefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Urecl. p. 215. Sydow, Monogr. i. 2. Fischer, Ured. Schweiz, p. 296, f. 216. Teleutospores. Sori amphigenous, on indistinct spots, minute, roundish or irregular, gene- rally scattered, compact, dark- brown ; spores oblong or clavate, rounded or gently attenuated at the apex and thickened (4—9/a), con- stricted, more or less tapering below, smooth, pale-brownish, 35—50 x 13—19 n; pedicels yellowish above, thick, persistent, about 40jx long; a few mesospores are sometimes intermixed. On Achillea Millefolium. For- den; St Leonards. August—October. (Fig. 82.) Plowright demonstrated { p. 216) that this species is quite distinct from P. Tripolii, with which it had been previously united, and his con- clusion has been confirmed by Magnus and others. The species is rather uncommon ; there is a closely allied one on A. Ptarmica (P. Ptarmicae Karst.) which has not yet been seen in Britain. The spores of P. Mille- folii germinate as soon as mature. Distribution : Central and Western Europe. 4. Puccinia Chrysanthemi Roze. Uredo Chrysanthemi Roze ; Plowright in Trans. Brit. Myc. Soc. i. 98. Puccinia Chrysanthemi Roze, Bull. Soc. Myc. Fr. 1900, p. 92. Sacc. Syll. xvi. 296. Sydow, Monogr. i. 46, 854. McAlpine, Rusts of Australia, p. 153, f. 251—5, and pi. E, f. 21. Fischer, Ured. Schweiz, p. 190, f. 150. P. Chrysanthemi-chinensis Henn. in Hedwig. xl. 26 (1901). 9—2. Please note that these images are extracted fr
Size: 1503px × 1663px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
