1171 



236 111 -L Mycologia 



Gymnosporangium corniculans Kern sp. nov. 



0. Pycnia epiphyllous, gregarious, in small groups o. 5-1 mm. 

 across, on discolored spots, rather prominent and conspicuous, 

 honey-yellow, becoming blackish, slightly flattened globose, 130- 

 175/x in diameter by 130-160^ high; ostiolar filaments 50-80^ 

 long. 



1. Aecia hypophyllous, crowded in irregular or annular groups, 

 2-5 mm. across, cylindrical or horn-shaped, acutish at apex, 2-3.5 

 mm. high ; peridium tardily dehiscent by longitudinal slits along 

 the sides, peridial cells usually seen in face view, broadly lanceo- 

 late, 16-23 by 64-96^, inner and side walls rather thick, 5-7/A, 

 moderately verrucose with oval or roundish papillae and a few 

 elongated papillae interspersed, outer wall thin, 1.5-2^, smooth; 

 aeciospores globoid, 19-26 by 23-32/x, wall dark cinnamon-brown, 

 rather thick, 3-4/x, finely verrucose, appearing nearly smooth. 



On Ameldhchier canadensis (L.) Medic, Burlington, Vt, Sept. 

 25, 1897, W. A. Orton; Fort Spring, W. Va., Sept. 14, 1906, 

 /. L. Sheldon; Granville, Mass., Sept. 22, 1890, A. B. Seymour 

 (Seym. & Earle, Econ. Fungi 2^.8 a ) ; AmclancJiicr crccta Blanch., 

 Isle Royale, Mich., Aug. 28, 1901, Stunts & Allen; Leland, Mich., 

 Sept. 7, 1908, Arthur & Kern; Amelanchier intermedia Spach, 

 Taughannock Falls, N. Y., Sept. 3, 1908, Ulictzcl, Wallace & 

 Reddick. 



III. Telia caulicolous, from a perennial mycelium, appearing 

 on irregularly lobed, gall-like excrescences 2-15 mm. or more in 

 diameter, unevenly distributed, often separated by the scars of 

 the sori of previous seasons, conical or cylindrical-acuminate, 

 1.5-2 mm. in diameter at the base by 3-5 mm. high, dark chestnut- 

 brown ; teliospores 2-celled, ellipsoid, 18-21 by 35-507*, slightly or 

 not constricted at the septum, slight hyaline thickenings over the 

 germ-pores, wall cinnamon-brown, thin 1-1.5/*; pedicel uniform, 

 long; pores 1-2 in each cell, near the septum. 



On Jnnipcrus korizontalis Moench, Leland, Mich., June 4, 1909, 

 F. D. Kern. 



4. Gymnosporangium sp. nov. Among the material collected 

 at Santee Canal, S. C. by Mr. F. D. Kern on March 18, 1909, 

 was an abundance of telia on Juniper us virginiana, in part ex- 

 tending along the smaller branches often for a foot or more, 

 and referred to above under unsuccessful cultures, and in part 

 forming rather distinct globoid galls from very small up to a half 

 inch or even more in diameter. It was difficult to tell in the field 

 whether there were two species associated or only the incidental 



