(464) 



Telia unknown. 



For the aecia: Aronia arbutifolia (L. f.) Ell. {Pyrus arbutifolia 



L. f.). 

 For the telia: unknown. 

 Type locality: Newfield, N. J., on Pyrus arbutifolia. 

 Distribution: Small area along the Atlantic coast from Massa- 

 chusetts to New Jersey. 



Illustration: Bot. Gaz. 49: pi. 21, f. 7. 



Exsiccati: Ellis, N. Am. Fungi 1088; Seym. & Earle, Econ. 

 Fungi 247, 24.7a; Roum. Fungi Sel. 4533; Thiim. Myc. Univ. 102Q; 

 Rab.-Paz. Fungi Eur. 4238. 



30. Gymnosporangium clavariaeforme (Jacq.) DC. Fl. Fr. 2: 



217. 1805 

 Tremella clavariaeforme Jacq. Collectan. 2: 174. 1788. 

 Tremella ligularis Bull. Herb. Fr. pi. 427. 1788. 

 Tremella digitata Vill. Hist. Pi. Dauph. 3: 1007. 1789. 

 Aecidium laceratum Sow. Engl. Fungi 318. 1801. 

 Aecidium Oxyacanthae Pers. Syn. Fung. 206. 1801. 

 Cy glides laceratum Chev. Fl. Env. Paris 1: 384. 1826. 

 Podisoma ligulatum Chev. Fl. Env. Paris 1: 423. 1826. 

 Tremella juniperina Wahl. Fl. Suec. 994. 1826. 

 Podisoma clavariaeforme Duby, Bot. Gall. 2: 881. 1830. 

 Podisoma Juniperi-communis Fries, Syst. Myc. 3: 508. 1832. 

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

 Roestelia carpophila Bagnis, Flora 63: 317. 1880. 

 Roestelia lacerata x Thaxter, Proc. Amer. Acad. 22: 266. 1887. 

 Puccinia penicillata Kuntze, Rev. Gen. PL 3 : 508. 1 898. 

 Gymnosporangium gracile Pat. Bull. Soc. Myc. Fr. 18: 46. 1902. 

 Gymnosporangium Oxycedri Bres. Broteria 2: 88. 1903. 

 Aecidium clavariaeforme Arth. Result. Sci. Congr. Bot. Vienne 343. 



I905- 



Aecia hypophyllous, fruiticolous, and caulicolous, usually 

 crowded in small groups 2-3 mm. across on the leaf blades, some- 

 times in larger groups on the veins, petioles, and twigs, often 

 densely aggregated on the fruits and occupying part or all of the 

 surface, cylindric, 0.7-1.5 mm. high by 0.3-0.5 mm. in diameter; 

 peridium soon becoming lacerate, usually to base, erect or spread- 

 ing; peridial cells long and narrow, often becoming curved when 

 wet, linear in face view, 18-30X80-130^, linear or linear-oblong 



