334 
J. C. ARTHUR 
The urediniospores are smaller than in the primary form, 16-19 by 
24-35/x, with the wall a little thicker, 1-1.5M, and not thickened above, 
or only moderately so, 2-8^. 
The spirally winged sculpturing of the urediniospores is described 
in the N. Amer. Flora 7 : 183. The rust, showing uredinia, was de- 
tected on a phanerogamic specimen in the Gray Herbarium, on 
Ruhus Schiedianus Steud., collected at Coban, Dept. Alta Vera Paz, 
H. von Tiirckheim ii4g. It has not yet been taken outside of Guate- 
mala. 
14. Spirechina Loeseneriana (P. Henn.) Arth. (on Rosaceae). 
Ruhus sp. 
A collection secured by C. & E. Seler, at Jalambohoch, Dept. 
Huehuetenango, August 1896, II, 268'/, was described by P. Hennings 
under the name Uredo Loeseneriana, and this was later made the basis 
of the genus Spirechina by the writer. Other collections have been 
made in South America, which supplied telia, but no other collection 
has yet been reported for North America. 
15. KuEHNEOLA MALVicoLA (Spcg.) Arth. (on Malvaceae). 
Malvaviscus arboreus Cav., Antigua, Dept. Sacatepequez, March i, 
1916, II, III, S43- 
Malvaviscus mollis DC., Huehuetenango, Jan. 22, 1917, II, III, 
766. 
A long-cycle rust for which the pycnia are not yet known. It was 
collected by Kellerman, on M. arhoreus (host determined by J. Donnell- 
Smith, Oct. 13, 1911), at Mazatenango, Feb. 28, 1905, II, 5^/5, and 
reported by Kern in Mycologia 3 : 288-290. 191 1. 
16. PucciNiASTRUM SPARSUM (Wint.) Ed. Fisch. (on Ericaceae). 
Arbutus sp., Cerro Quemado, Dept. Ouezaltenango, Jan. 21, 1915, 
II, 121. 
A heteroecious rust, especially common in western North America. 
It has not been reported before from so far south. Recent cultures by 
Dr. Ed. Fischer of Berne, Switzerland, show that in Europe the aecia 
occur on Picea. 
17. Melampsoridium Alni (Thiim.) Kleb. (on Betulaceae). 
Alnus acuminata H. B. K., Sololo, 7,500 feet alt., Jan. 29, 1915, II, 
150. 
Ahtus jorullejisis H. B. K., Quezaltenango, Jan. 28, 1917, II, 791. 
