58 BOTANICAL GAZETTE [JULY 
urediniospores obovate, obovate-elliptical to subpyriform, 15-18 
_ by 25-37 », average for 20 spores 16.9 by 31.7 u, walls ochraceous- 
tawny, concolorous, thick, 2.5-3.5 4, apex but slightly if at all 
thickened, echinulate; germ pores prominent, 6 in equator. 
III. Telia amphigenous, usually epiphyllous, sparse, scattered, 
small, o.1-0.5 mm. across, bullate to elliptical, subcuticular, 
blackish-brown, tardily naked, ruptured cuticle very conspicuous; 
paraphyses none; teliospore heads chestnut-brown, subglobose, 
40-60 p in diameter, average for 20 heads 50.5 u, 2-4 spores across, 
5-10 spores to each head, 4-8 marginal, o-3 inner spores, usual 
number of spores per head 7-8, each spore bearing 3-6 short hydline 
tubercles 3-5 4 long; cysts few, 4-8, as many as the marginal 
spores, subglobose, subpendant around pedicel, not cohering, 
easily. swelling and bursting in water; pedicel hyaline, short, 
—— compound. 
On Mimosaceae. Type collected on Siderocarpos flexicaulis 6 ‘alien from 
Brownsville, near Tandy’s Switch, Texas, November 11, 1916, by W. H. Long 
_ (no. 6174). This Ravenelia is very abundant on this heat 4 in the Texas ebony 
jungles in the immediate vicinity of Brownsville. It is probably common 
wherever its host is found i in sufficient quantity to form thickets. 
Ravenelia prosopiis, sp. nov. 
oO. 
‘IL, Uredinia sparse in material examined, small, amphigenous, 
‘ead ealylow, often in a circle around a central sorus, 0. 5—- 
-_y.9mm. across, narrowly elliptical to , subepidermal, long 
| covered by the epidermis, ruptured ad very prominent; 
___ urediniospores oval to subpyriform, 13-20 by 24-41 p, strontium 
: lla eae for 40 spores, 16. one S had walls: I. 5-2 u thick, 
oe 4-6 in equ ¢ ua tor; paraphyses abu aed dan t, of two ape, ia deal pane : 
a capitate, the ae Saane clavate, ina Sense bane around the i : 
