GYMNOSPORANGIUM 



307 



iEcidia on leaves, branches and fruits of Crataegus Oxy- 

 acantha, C. monogyna, Mespilus ger- 

 manica, Cydonia vulgaris, June — 

 August; teleutospores on Juniperus 

 Sabina, April and May; uncommon. 

 (Fig. 232.) 



The course of the life history of this 

 species is identical with that of the pre- 

 ceding. It is distinguished by its shorter 

 and broader teleutospores, which resemble 

 those of G. Sabinae, but the rccidia are 

 quite different from those of that species 

 and resemble those of O. clavariaeforme. 

 The fficidia of G. confusum are reported 

 also doubtfully on Pyrus communis and 

 Cotoneaster integerrimus. The cells of the 

 peridium have their side-walls marked 

 with elongated obliquely placed ridges, 

 while those of G. clavariaeforme have them 

 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, i.e. of the typical R. lacerata. 



Fig. '2rS2. G. confusum. a, 

 cluster of ascidia on Haw- 

 thorn twig, nat. size; b, two 

 peridia of same x 10 ; c, clus- 

 ter of aBoidia on Quince leaf, 

 x 5 ; d, two teleutospores on 

 J. Sabina x 600. All from 

 cultures by Plowright. 



than those of G. clavariae- 



Distpjbution : Europe, Northern Persia. 



3. Gymnosporangium Juniperi Link. 



Tremella juniperina L. Sp. PL p. 162"). 



Roestelia cornuta Tul. ; Cooke, Haudb. p. 534, f. 218 ; Micr. Fung. 



p. 193, pi. 2, f. 18, 19. 

 Gymnosporangium Juniperi Link, Obs. i. 7. Cooke, Handb. p. 509, 



f. 203 ; Micr. Fung. p. 214. Sydow, Monogr. iii. 27, f. 11. 

 G. juniper inum Fr. Syst. Myc. iii. 506. Plowr. Ured. p. 235. Fischer, 



Ured. Schweiz, p. 391, f. 278. Saccx Syll. vii. 738 p.p. 

 G. corn "turn Arthur, Mycologia, i. 240. Kern, N. Amer. Fl. vii. 198. 



Spermogones. Epiphyllous, subepidermal, in roundish 

 crowded groups, yellowish, at length black. 



20—2 



