. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 307 JEcidia on leaves, branches and acantha, G. monogyna, Mespilus ger- manica, Cydonia vulgaris, June— August; teleutospores on Juniperus Sabina, April and May ; uncommon. (Fig. 232.) The of the life of this species is identical with that of the pre- ceding. It is distinguished by its shorter and broader teleutospores, which resemble those of 6'. iSahinae, but the ajcidia are quite different from those of that species and resemble those of G. clavariaeforme. The ascidia of O. c
. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 307 JEcidia on leaves, branches and acantha, G. monogyna, Mespilus ger- manica, Cydonia vulgaris, June— August; teleutospores on Juniperus Sabina, April and May ; uncommon. (Fig. 232.) The of the life of this species is identical with that of the pre- ceding. It is distinguished by its shorter and broader teleutospores, which resemble those of 6'. iSahinae, but the ajcidia are quite different from those of that species and resemble those of G. clavariaeforme. The ascidia of O. confusum are reported also doubtfully on Pyrus communis and Cotoneaster iittegerrimus. The cells of the peridium have their side-walls marked with elongated obliquely placed ridges, while those of G. clavariaeforme have tliem coarsely warted. This description is taken from Fischer and Plowright, both of whom give long accounts of its peculiarities. In all Plowright's specimens of G. confusum (produced artificially on Hawthorn, Quince, Medlar) the peridia were smaller, shorter, less deeply torn, and rather more inflated forme, of the typical R. Fig. 232. G. confttHum. a, chister of tecidia on Haw- thorn twig, nat. size; b, two peridia of same x 10; c, clus- ter of ascidia on Quince leaf, X 5 ; d, two teleutospores on J. Sabina x 600. All from cultures by Plowright. than those of G. clavariae- DisTRiBUTiON : Europe, Northern Persia. 3. Gymnosporangium Juniperi Link. Tremella juniperina L. Sp. PL p. Roestelia cornuta Tul. ; Cooke, Handb. p. 534, f. 218; Micr. Funo-. p. 193, pi. 2, f. 18, 19. Gymnosporangium Juniperi Link, Obs. i. 7. Cooke, Ilandb. p. 509, f. 203 ; Micr. Fung. p. 214. Sydow, Monogr. iii. 27, f. 11. G. juniper ilium Fr. Syst. Myc. iii. 506. Plowr. Ured. p. 235. Fischer, Ured. Schweiz, p. 391, f 278. Sacc. Syll. vii. 738 G. cornutum Arthur, Mycologia, i. 240. Kern, N. Amer. Fl. vii. 198. Spermogones. Epiphyllous, subepidermal, in roundish
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