. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 312 CHRYSOMYXA 2. Chrysomyxa Pyrolae Rostr. JSddmm. Pyrolae DC. Flor. Fr. vi. 99. Trichobasis Pyrolae Berk.; Cooke, Handb. p. 529; Micr. Fung. p. 223 Chrysomyxa Pyrolae Eostr. Bot. Centr. iii. 126 (1881). Plowr. Ured. p. 253. Fischer, Ured. Sohweiz, p. 429. Sacc. Sjll. vii. 761. Melampsoropsis Pyrolae Arthur, N. Amer. Fl. vii. 118. Uredospores. Sori hypophyllous, often covering the whole surface uniformly, roundish, |-—1 mm. diam., soon naked, surrounded by the torn epidermis and a very delicate evanescent
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 312 CHRYSOMYXA 2. Chrysomyxa Pyrolae Rostr. JSddmm. Pyrolae DC. Flor. Fr. vi. 99. Trichobasis Pyrolae Berk.; Cooke, Handb. p. 529; Micr. Fung. p. 223 Chrysomyxa Pyrolae Eostr. Bot. Centr. iii. 126 (1881). Plowr. Ured. p. 253. Fischer, Ured. Sohweiz, p. 429. Sacc. Sjll. vii. 761. Melampsoropsis Pyrolae Arthur, N. Amer. Fl. vii. 118. Uredospores. Sori hypophyllous, often covering the whole surface uniformly, roundish, |-—1 mm. diam., soon naked, surrounded by the torn epidermis and a very delicate evanescent peridium, yellow; spores in chains, roundish or polygonal, verrucose, orange, 21—28x18—21/j,. Teleutospores. Sori hypophyllous, covering the whole leaf-surface uni- formly, up to \ mm. wide, roundish or oblong, flat, waxy, yellowish- then blood-red, when dry brown; spores ellipsoid, about 8 jjl wide, in rows as much as 100—120/Ci long. On Pyrola minor, P. rotundifolia and its var. P. maritima. Uncom- Edinburgh, Kew Gardens,. raon; Pig. 236. G. Pyrolae. a, uredo- sori, on underside of leaf, nat. size; 6, chains of young uredospores, showing inter- calary cells; c, jnature ure- dospore. On P. maritima (Formby, ex herb. H. J. Wheldon). Lancashire, (Fig. 236.) etc. April—August. This parasite may possibly be heteros- cious ; Fraser (Myoologia, 1911, iii. 67) suggests that Peridermium conorum-Piceae is its SBcidium ; Rostrup, Arthur, and Kern had already expressed the same idea. The teleutospores are' rarely formed, and the fungus probably maintains itself by its uredospores, which can be distinguished from those of Pucciniasirum Pyrolae by their sori being scattered (not in grodps), and by the absence of a distinct peridium. Distribution : Europe, North 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 origin
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