Part 4, 1920] AECIDIACEAE 
ae cal amine thickened above 
—10 u). 
Teliospores with digitate projections 
at apex. 
Teliospores smooth at apex. 
Urediniospores medium-sized (18~ 
25 X 21-29 yw). 
Teliospores small (25-29 u long). 
Teliospores medium-sized (35— 
64 uw long). 
Urediniospores rather large (23-29 
. X 28-35 mu). 
Urediniospore-wall dark-yellow or brown. 
Urediniospores of the modified sort (amphi- 
spores) present. 
Teliospores with septum often vertical or 
oblique. 
Teliospores with septum horizontal. 
Urediniospores of the modified sort unknown. 
Urediniospore-wall verrucose. 
Teliospores often I-celled (meso- 
spores). 
Teliospores usually uniformly 2-celled. 
Urediniospore-wall echinulate. 
Teliospores with septum often vertical 
or oblique. 
Teliospores medium-sized (26-48 u 
long). 
Teliospores smaller (24-32 yu long). 
Teliospore-wall thin (1-1.5 x). 
Teliospore-wall moderately 
thick (2—2.5 u). 
Teliospores with septum horizontal. 
Urediniospores ellipsoid. 
Teliospores germinating at ma- 
turity. 
Teliospores germinating after a 
resting period. 
Urediniospores globoid or nearly so. 
Urediniospores rather small (15 
-19 x 18-22 yp). 
Urediniospores medium-sized 
(18-26 x 19-29 y). 
Urediniospore-pores 3-6. 
Urediniospore-pores 6-8. 
Teliospores rather small 
(up to 48 uw long). 
Teliospores mediu m- 
sized (up to 564 
long). 
Urediniospore-wall moderately thick (more than 2 yu). 
Urediniospore-wall pale-yellow or colorless. 
Teliospore-wall not thickened above. 
Teliospore-wall longitudinally striate, 
Teliospore-wall verrucose. 
Teliospore-wall thickened above, smooth. 
Urediniospore-wall moderately thick (2—- 
5M). 
Urediniospore-wall very thick (3-4 y). 
Urediniospore-wall brown. 
Urediniospores of the modified sort (amphi- 
spores) present. 
Urediniospores of the modified sort unknown. 
Urediniospore-wall echinulate. 
Urediniospore-wall verrucose. 
Urediniospores medium-sized (18-24 yw 
wide). 
Teliospores 3-7 yw thick above. 
Teliospores 6-12 u thick above. 
Urediniospores rather large (26-29 » 
wide). 
Urediniospore-pores, or urediniospores, rarely seen or un- 
known. 
Urediniospores unknown. 
Urediniospores known but pores obscure. 
' Uredinial paraphyses present. 
Paraphyses medium-sized (10-15 X 29-50 y). 
Paraphyses large (10-29 X 58-98 4). 
Uredinial paraphyses absent. 
Urediniospore-wall thickened above. 
58. 
D 
. Periclymeni. 
. exasperans. 
. Sitpae. 
. macrum, 
. Boutelouae. 
. scaber. 
. Sarcobati, 
Windsoriae. 
. flaccidum. 
. Aegopogonis. 
. dochmium, 
. monoicum, 
luxuriosum. 
. micranthum. 
. Andropogonis. 
. hibisciatum, 
. amphigenum. 
. Paitersonianunt. 
. paradoxicum, 
. abundans. 
. Distichlidis. 
vexans. 
. hibisciatum. 
. Leptochloae. 
. Sarcobati. 
. Setariae. 
. leptosporum. 
. tubulosum. 
. Triniochloae. 
. Cephalanthi. 
271 
