( 4 6a) 



For the aecia: Pyrus betulifolia Bunge, 



P. eleaginifolia Pall., P. Michauxii (hort), P. nivalis Jacq., 

 P. salicifolii L., P tomentosa Moench. 

 For the telia: Juniperus chinensis L., /. japonica Carr., /. phoe- 

 nica L., /. Sabina L., /. sphaerica Lindl., /. tripartita (hort), 

 /. virginiana L. 

 Distribution: Europe. 



Illustrations : Beitr. Krypt. Schweiz 2 2 : /. 279; Hedwigia 34: 3, 

 /. 4; E. & P. Nat. Pflanzenfam. I 1 **: /. 32. 



Exsiccati: Sacc. Myc. Ital. 709; Sydow, Ured. 86, 87, 88, 

 379, I 435, I 43 6 l Sydow, Myc. Mar. 72, 427, 2510, 274.6, 2747, 

 3128, 4126; Eriks. Fungi Paras. Scand. 279; Thiim. Myc. Univ. 

 537, I 435i Krieger, Schad. Pilze 14, 15; Briosi & Cavara, Funghi 

 Parass. 131; Rab. Fungi Eur. 1882; Linhart, Fungi Hung. 237; 

 Allesch. & Schn. Fungi Bavar. 31; Krieger, Fungi Sax. 60, 477; 

 Roum. Fungi Gall. 252, 434. 



28. Gymnosporangium Mespili (DC.) 

 Aecidium Mespili DC. Fl. Fr. 6: 98. 1815. 



Aecidium Cydoniae Lenorm.; Duby, Bot. Gall. 2: 903. 1830. 

 Aecidium Cotoneasteris Korn. Hedwigia 16: 24. 1877. 

 Roestelia Cydoniae Thiim. (Fungi Parenzo 278) in Sacc. Syll. Fung. 



7: 834. 1888. 

 Gymnosporangium confusum Plowr. Brit. Ured. et Ustil. 232. 



1889. 

 Tremella Mespili Arth. Proc. Ind. Acad. Sci. 1900: 135. 1901. 

 Aecia hypophyllous and caulicolous, gregarious, cylindric, 

 slender, 0.1-0.2 mm. in diameter by 1-2 mm. high; 

 peridium soon becoming irregularly lacerate, often 

 nearly to base, somewhat spreading; peridial cells 

 seen in both side and face views, linear-rhomboid in 

 side view, 15-24 by 65-80/i, lanceoate in face view, 

 17-21JU broad, outer wall thin, 1-1.5^, smooth, inner 

 and side walls rather thick 5-7^, rather strongly ru- 

 gose with ridges of varying length; aeciospores glo- 

 boid, 19-22 by 19-26^, wall rather thick, 2.5-3.5/i, 

 cinnamon-brown, finely verrucose. 



Telia caulicolous causing very slight fusiform 



Fig. 24. G. enlargements, conic or laterally compressed, 5-8 



Mespili. mm - high, dark chestnut-brown; teliospores 2-celled, 



ellipsoid, 19-26 by 35-48/i, mostly not constricted at 



the septum, usually rounded at the apex and narrowed below, wall 



