(444) 



Telia chiefly caulicolous, appearing on slight fusiform swellings 

 of the smaller branches, applanate, indefinite, varying in size, 

 3-5 mm. across, chestnut-brown; teliospores 2-celled, very broadly 

 ellipsoid, 23-39X45-56/1, usually rounded both above and below; 

 slightly or not constricted at the septum, wall light chestnut- 

 brown, 1.5-2/1 thick, without hyaline thickenings over the germ- 

 pores; pores 1 or 2 in each cell, apical or near the septum. 



For the aecia: Amelanchier ovalis Medic. {A. vulgaris 



Moench., Aronia rotundifolia Pers.). 

 For the telia: Juniperus communis L. [/. sibirica Burgsd.]. 

 Type locality: Jura, France, on Amelanchier [vulgaris]. 

 Distribution: Europe. 

 Illustrations: Zeits. f. Bot. 1:/. 7. 



Exsiccati: Sydow, Ured. 2287; Allesch. & Schn. Fungi Bav. 514; 

 Roum. Fungi Gall. 2732; Desm. PL Crypt. Fr. 1377; Briosi & 

 Cavara, Funghi Paras. 162; Sacc. Myc. Ven. 399; Sacc. Myc. 

 Ital. 1097, 1257; Rab.-Paz. Fungi Eur. 4.112. 



10. Gymnosporangium cornutum (Pers.) Arth. Mycologia 1: 



240. 1909 

 Aecidium cornutum Pers. in J. F. Gmel. Syst. Nat. 2: 1472. 1791. 

 Caeoma cornutum Schlecht. Fl. Berol. 2: in. 1824. 

 Caeoma cylindrites Link, in Willd. Sp. PL 6 2 : 64. 1825. 

 Gymnosporangium Juniperi Link, in Willd. Sp. PL 6 2 : 127. 1825. 

 Centridium Sorbi Chev. Fl. Env. Paris 1: 383. 1826. 

 Gymnosporangium aurantiacum Chev. Fl. Env. Paris 1 : 424. 1826. 

 Roestelia cornutum Fries, Sum. Veg. Scand. 2: 510. 1849. 

 Ceratitium cornutum Rabenh. Bot. Zeit. 9: 452. 1851. 

 Podisoma juniperinum Oersted, Overs. Danske Vid. Selsk. Forh. 



1866: 191. 1866. 



Aecia chiefly hypophyllous, in irregular or annular groups 3-10 

 mm. across, on thickened discolored areas, cylindric, somewhat 

 attenuated above, acute at apex, 3-5 mm. high, 0.4-0.6 mm. in 

 diameter; peridium rupturing rather tardily at apex, becoming 

 somewhat but not deeply lacerate; peridial cells seen in both face 

 and side views, broadly lanceolate in face view, 19-29X60-110/1, 

 rhomboid in side view, 30-35/1 thick, outer wall thin, 2/i, smooth, 

 inner and side walls thick, 8-12/1, moderately rugose with short 

 ridge-like papillae; aeciospores globoid, 18-25X21-29/1, wall light 

 chestnut-brown, 2-2.5/1 thick, rather finely verrucose. 



Telia chiefly caulicolous, usually appearing on slight fusiform 



