ARTHUR: NEW SPECIES OF UREDINEAE 156 
1893, C. G. Pringle, communicated by W. G. Farlow. A species 
of the general characteristics of A. roseum and A. steviicola, both 
of which are also on carduaceous hosts, but with very much 
smaller spores. It is likely to prove to be heteroecious. 
Uredo egenula sp. nov. 
II. Uredinia epiphyllous, Se oblong or linear, 0.1—-1.2 
mm. long, early naked, pulverulent, cinnamon-brown, ruptured 
epidermis evident; anes potas globoid to broadly ellipsoid, 
21-25 by 26-344; wall cinnamon-brown, 1.5-2.5 thick, moder- 
ately echinulate, the pores 2, equatorial, prominent. 
On Sporobolus argutus (Nees) Kunth, alkali soil below Gregory 
Park, Healthshire Hills, Halfmoon Bay, Jamaica, West Indies. 
The specimen was removed from a phanerogamic collection in 
the National Herbarium, made October 31, 1912, by A. S. Hitch- 
cock 9760, and communicated by Mrs. Agnes Chase. The form 
is one that seems to fit no recorded species on Sporobolus. It is 
named and described in order to call attention to the need of 
search for the telial stage, and of observations that may eventually 
lead to finding the aecia. 
Uredo panamensis sp. nov. 
II. Uredinia hypophyllous, crowded in Sn —— 
2-3 mm. across on slightly discolored spots of nearly same 
size, round or oblong, 0.3-0.5 mm. in diameter, the Bet one 
usually much larger, subepidermal, early naked, applanate, 
cinnamon-brown, ruptured epidermis evident; urediniospores 
globoid or broadly ellipsoid, 20-27 by 24-31 4; wall cinnamon- 
. brown, rather thick, 2-3 u, very closely echinulate, often appearing 
verrucose, the pores distinct, 3, approximately equatorial. 
On Phytolacca decandra L., Panama, December 7, 1915, 
E. W. D. Holway 234. The sorus is without special inclosing 
structures, and resembles the form common for the genera Puc- 
cinia and Uromyces. The species is quite unlike Puccinia 
Rivinae (B. & C.) Speg., the only other rust known on this family 
of hosts. 
Uredo unilateralis sp. nov. 
II. Uredinia hypophyllous, in groups 2-4 mm. across, more or 
less circinate, or scattered, round, 0.2-0.8 mm. in diameter, soon 
