114 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
12. Cronartium notatum (Arth.) comb. nov. 
Uredo notata Arth. Mycologia 9: 89. 1917. 
ON MALPIGHIACEAE: 
Byrsonima crassifolia (L.) H. B. K., San Marcos (Prov. 
Santa Clara), Nov. 18, 1915, II, Johnston 186; Las Tunas 
(Prov. Oriente), March 29, 1916, ii, III, Johnston 545. 
The rust has previously only been known from ‘Porto Rico, 
and in the uredinial stage. The fine specimen obtained by Mr. 
Johnston at Las Tunas provides the following characters for the 
telial stage. E 
Telial columns hypophyllous, somewhat grouped, rather 
numerous, cylindrical, moderately stout and short, 1—1.5 mm. long, 
90-145 и broad, chestnut-brown; teliospores oblong, 17-26 by 
45-64 и, obtuse or truncate at both ends; wall yellow, 2-3 и thick, 
smooth. 
The species differs from C. Byrsonimatis P. Henn., known from 
South America on B. coccolobifolia, by the somewhat larger uredin- 
iospores, with their walls less thickened at apex, the conspicuous 
development of imbricated paraphyses, and by the thicker-walled 
teliospores. 
It might be well to call attention to the possibility that this 
rust, instead of being heteroecious, as in species of temperate 
regions, may be autoecious.. There is an aecial form in Mexico 
on this host, first described as Endophyllum singulare D. & Н., 
which from its morphology may well belong here. 
13. Cronartium Wilsonianum sp. nov. 
ON VITACEAE: 
Cissus rhombifolia Vahl, San Juan, Isle of Pines, March 
I5, 17, 1916, II, III, Britton, Britton & Wilson 15552. 
Uredinia chiefly hypophyllous, numerous, scattered, sometimes 
crowded in small groups, round, small, 0.2 mm. or less in diameter, 
dehiscent by a central rupture, soon wide open, pulverulent, very 
pale straw-color; paraphyses apparently free, peripheral, incurved, 
clavate, 13-15 by 35-40 u, the wall very pale yellow or colorless, 
thin, about тр, smooth; urediniospores broadly ellipsoid or obovoid, 
18-21 by 24-27 u; wall pale yellow or colorless, thin, 1.5 и or less, 
sparsely and very sharply and prominently echinulate, the pores 
obscu 
re. 
Telial columns hypophyllous, 2-3 mm. in length, about 704 
thick, filiform, dark chestnut-brown; teliospores terete or fusiform, 
