ARTHUR: NEW SPECIES OF UREDINEAE—XV 57 
mon brown, 1-1.5u. thick, finely and closely echinulate, the pores 
indistinct, about 6, scattered. 
Ill. Telia nupokulons similar to the uredinia, somewhat 
pulvinate, chestnut-brown, ruptured epidermis inconspicuous; 
teliospores oblong or yaeor, 18-21 by 48-674, rounded or 
blunt at both ends, slightly or not constricted at septum, ger- 
minating at maturity; wall dark cinnamon-brown, uniformly 
thin, about Iy, or slightly thicker at apex with a small hyaline 
papilla over germ-pore, smooth; pedicel delicate, ae 
10-16y. in diameter, collapsing, once to twice length of s 
On Helianthus hypargyreus Blake ined. (Carduaceae), vicinity 
of Huigra, Ecuador, on the Hacienda de Licay, September 6, 
1918, i, II, III, J. N. & Geo. Rose 22569. This species, like 
P. ecuadorensis, has urediniospores with scattered pores, which 
taken with the long delicate teliospores with their obtuse ends, 
germinating at maturity, make it a distinctive form. The mark- 
ings of the aeciospores are also unusual, often appearing distinctly 
reticulate. Only old aecia have been seen, which have not 
yielded all the characters with certainty. 
Uromyces Standleyanus sp. nov. 
II, Uredinia hypophyllous, scattered or closely pregore, 
round, 0.3-0.5 mm. in diameter, soon na , pulverulent, cin 
namon-brown, ruptured epidermis Aopreennacy ath eedintel 
spores broadly ellipsoid or obovate, 23-26 by 29-32u; wall 
pale golden-brown with a colorless outer layer becoming evident 
in eae acid, moderately thick, 34, strongly and sparsely echinu- 
late, the points 3-5 apart, the pores indistinct, apparently 3, 
approximately equatorial. 
III. Telia hypophyllous, scattered, round, about 0.5 m 
in diameter, soon naked, pulvinate, cinn amon-brown, clightly 
teliospores obova cuneiform, 15-19 by 38-42, rounded 
e, narrowed ot gad oa at maturity; wall pale 
persian cra SP rown, thin, greatly thickened above, 12-16y, 
mooth; pedicel ae ie length of spore or less. 
On Gaudichaudia Schiedeana Juss. (Malpighiaceae), near 
Tonacatepeque, Department of San Salvador, Salvador, Dec. 
30, 31, 1921, Paul C. Standley 19461. This species possesses 
the sparsely and strongly echinulate urediniospores so general 
in the rusts of the Malpighiaceae, and also the hygroscopic 
layer beneath the cuticle, causing the cuticle to swell like a 
