. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 131 the epidermis and resemble rather a Dothidea or Asteroina than a Fuccinia. 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 parts. 3. Puccinia Millefolii Fckl. Pucdnia MUlefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 215. Sydow, Monogr. i. 2. Fischer, Ured. Sohweiz, p. 296, f. 216. indistinct spots,. F
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON COMPOSITE 131 the epidermis and resemble rather a Dothidea or Asteroina than a Fuccinia. 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 parts. 3. Puccinia Millefolii Fckl. Pucdnia MUlefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 215. Sydow, Monogr. i. 2. Fischer, Ured. Sohweiz, p. 296, f. 216. indistinct spots,. Fig. 82. P. MUlefolii. spores. Teleuto- Teleutospores. Sori amphigenous, on 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/j,), con- stricted, more or less tapering below, smooth, pale-brownish, 36—50 x 13—19 /i; pedicels yellowish above, thick, persistent, about 40/a long; a few mesospores are sometimes intermixed. On Achillea Millefolium. For- den; St Leonards. August—October. (Fig. 82.) Plowright demonstrated (Ic. p. 216) that this species is quite distinct from P. TripoUi, 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. Pta/rmioa (P. Ptarmicae Karst.) which has not yet been seen in Britain. The spores of P. MUle- folii germinate as soon as mature. Distribution : Central and Western Europe. 4. Puccinia Chrysanthemi Roze. Uredo Chrysanthemi Eoze ; 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. Ghrysanthemi-chinensis Henn. in Hedwig. xl. 26 (1901). 9—2. Please note that these images are extracted from scanned page imag
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