. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON 269 I have found that in many cases only one chister is formed (or at most two small ones) on a leaf; this probably indicates a scarcity of active basidiospores. In other localities, however, eight or ten clusters may be found on a single leaf. This ;ecidium must not be confounded with Caeoma Allionim, which belongs to the Melampsora3. (4) PucciNiA Phalakidis Plowr. jEcidium Ari Desm. Cat. Plant, oniis. p. 26. Cooke, Handb. p. 545 ; Micr. Fung. p. 199. Pucciaia Phalaridis Plowr. Journ. Linn. Soc. 1
. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON 269 I have found that in many cases only one chister is formed (or at most two small ones) on a leaf; this probably indicates a scarcity of active basidiospores. In other localities, however, eight or ten clusters may be found on a single leaf. This ;ecidium must not be confounded with Caeoma Allionim, which belongs to the Melampsora3. (4) PucciNiA Phalakidis Plowr. jEcidium Ari Desm. Cat. Plant, oniis. p. 26. Cooke, Handb. p. 545 ; Micr. Fung. p. 199. Pucciaia Phalaridis Plowr. Journ. Linn. Soc. 1888, xxxiv. 88; Ured. p. 166. Sydow, Monogr. i. 783. P. Art-Phalaridis Kleb. in Pringsh. Jahrb. 1S99, p. 399. Fischer, Ured. Schweiz, p. 344, f. 252. Spsrmogones. Epiphyllous or a few liypophyllous, dark honey-coloured, in roundish groups. ^cidiospores. ^'Ecidia hypophyllous, in roundish clusters (often surrounding a little group of spermogones), on conspicuous pale- yellow spots, cup-shaped, with a broad cut white revolute margin; spores deli- cately verruculose, yellow, 15—26/a. yEcidia on Aram macidatuin. Not common. May—July. (Fig. 205.) The same remark may be made about the occurrence of this as about the preceding form. The three latter races are biologictilly quite dis- tinct in so far that, in experimental cultures, each of them will produce the a^cidium only on that particular genus to which it has become accustomed. This has been abun- dantly proved by Plowright, Klebahn, Fischer, Dietel and others. But the groups of tecidia are exactly of the same type in each case, and must have had a common origin in the Fig. '205. P. Phalaridis. iEcidia on Arum )naculatum. x h. 124. Puccinia Anthoxanthi Fckl. Fuccinia Anthoxanthi Fckl. Syrnb. Myc. Nachtr. ii. 15. Plowr. Ured. p. 194. Sacc. Syll. vii. 665. Sydow, Monogr. i. 727. Fischer, Ured. Schweiz, p. 261. McAlpine, Rusts of Australia, p. 115, f. 20— Please note that these images are extracted from scanned page
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