Arthur; Uredinales of Porto Rico 
331 
smooth wall ; urediniospores ellipsoid or somewhat obovoid, 
15- 21 by 19-28 ju.; wall nearly or quite colorless, thin, 1.5 /x, 
closely and finely verrucose-echinulate, the pores obscure. 
On Fabaceae; 
Dolichos Lablab L., Jayuya, Dec. 17, 6042 (type). 
Teramnus uncinatus (L.) Sw., Jayuya, Dec. 17, 5 pp 5 . 
The Uredo Teramni Mayor differs greatly from the above 
species in having a sorus without paraphyses, and in having 
globose, 2-pored spores. 
108. Uredo jatrophicola sp. nov. 
Uredinia hypophyllous, crowded on slightly discolored spots 
or evenly scattered, bullate-conical, small, o. 1-0.3 in diam- 
eter, long covered by the overarching epidermis, opening by a 
central pore that gradually enlarges ; peridium paraphysoid, the 
paraphyses clavate with the slender stalks firmly united into an 
enclosing wall, and with the heads, 9-12 /a broad, imbricately pro- 
jecting into the cavity of the sorus, the largest ones at the orifice, 
the wall smooth, about i /x thick and colorless below, about 3-7 /x 
and tinted above; urediniospores ellipsoid or obovoid-ellipsoid, 
16- 20 by 24-29 /x; wall very pale yellow or colorless, thin, 1-1.5/x, 
rather closely and finely echinulate; pores not discernible. 
On Euphorbiaceae : 
Jatropha Curcas L., Hormigueros, Jan. 14, 220 (type). 
Jatropha gossypifolia L., San German, Dec. 8, 4113, 4790 ; 
Guayama, Dec. 4, 5401 ; Guayanilli, Nov. 13, 5866bis. 
The species has also been detected on phanerogamic speci- 
mens: on /. Curcas, St. Domingo, March, 1913, Rose, Fitch & 
Russell 4064; on J. gossypifolia, Cuba, April, 1903, J. A. Shafer 
86 , March, 1910, Britton & Wilson 5549, St. Croix, Feb., 1913, 
Rose, Fitch & Russell 3204. 
The paraphysoid peridium and pale spores make a marked dis- 
tinction between this and other known rusts on Euphoriaceous 
hosts. Small subepidermal sori were found on the two Cuban 
specimens that appeared like compact, lens-shaped telia, beneath 
the epidermis, with small, smooth, thin-walled spores, but they 
were very few and uncertain, and may have been only young 
uredinia. 
