Part 4, 1920] 
AECIDIACEAE 
Host belonging to family Cannaceae. 
Host belonging to family Marantaceae. 
Host belonging to family Orchidaceae. 
Uredinia and telia inhabiting dicotyledonous hosts. 
Host belonging to family Polygonaceae. 
Urediniospore-pores 2, occasionally 3, distinct. 
Urediniospore-wall thin, 1-1.5 yu. 
Urediniospore-wall moderately thick, 1.5-2.5 yu. 
Urediniospore-pores 3 or more, often indistinct. 
Teliospores with colorless papillae over the pores. 
Teliospore-papillae 1.52 y. 
Teliospore-papillae 3-5 u. 
Teliospores broad, 18-23 p. 
Teliospores narrow, 13-19 yu. 
Urediniospore-wall 1 « or more, brown. 
Urediniospore-wall 1 yu or less, yellow. 
Teliospores without papillae over the pores. 
Teliospore-wall uniform in thickness. 
Teliospores small, 15-19 X 20-28 un. 
Teliospores larger, 16-21 X 24-35 yp. 
Teliospore-wall thicker at apex, 5-9 p. 
Teliospores smooth. 
‘Teliospores verrucose-rugose. 
Host belonging to family Amaranthaceae. 
Urediniospores small, 16-19 X 19-23 yu. 
Urediniospores larger, 18-26 * 23-34 p. 
Urediniospores obliquely rugose. 
Urediniospores echinulate. 
Host belonging to family Petiveriaceae. 
Host belonging to family Alsinaceae. 
Urediniospores verrucose; teliospore-wall thick, 3-5 yp. 
Urediniospores echinulate; teliospore-wall thin, 1.5-2.5 pu. 
Host belonging to family Ranunculaceae. 
Urediniospores with 2 pores, rarely 3. 
Teliospores 15-22 « broad, mostly ellipsoid. 
Teliospores 20-34 4 broad, mostly oblong. 
Urediniospores with 3 pores, rarely 2; teliospores 23-30 u 
broad. 
Host belonging to family Fabaceae. 
Host belonging to family Oxalidaceae. 
Host belonging to family Balsaminaceae. 
Host belonging to family Violaceae. 
Host belonging to family Onagraceae. 
Host belonging to family Haloragidaceae. 
Host belonging to family Ammiaceae. 
Urediniospores 29-37 uw long. 
Urediniospores less than 32 » long. 
Urediniospore-wall thick, 2-4 hu. 
Urediniospore-wall thinner, 2.5 » or less. 
Teliospores smooth, 
Teliospores rough. 
Teliospores reticulate. 
Teliospores verrucose or rtigose. 
Teliospore-wall thin, 1-1.5 » 
‘Teliospore-wall rather thick, 1.5-2.5 yw. 
Host belonging to family Primulaceae. 
Host: belonging to family Gentianaceae. 
Host belonging to family Convolvulaceae. 
Urediniospore-wall thick, 2-3 yu. 
Echinulations rather fine, 2-3 » apart. 
Echinulations prominent, 4-6 yw apart. 
Urediniospore-wall thin, 1.5-2 yu. 
Urediniospores 21-26 w broad; teliospore-wall 7-15 at 
apex. 
Urediniospores 27-33 » broad; teliospore-wall 3 or less 
at apex. . 
Host belonging to family Polemoniaceae. : 
Urediniospore-wall finely and inconspicuously echinulate. 
Urediniospore-wall rather coarsely and conspicuously echin- 
ulate. : : 
Host belonging to family Boraginaceae. 
Host belonging to family Lamiaceae. 
Teliospore-wall thin, 1 » or less, usually colorless or pale cinna- 
mon-brown. . : 
Teliospore-wall uniform in thickness. 
Teliospores 30-35 « long. 
Teliospores more than 45 yu long. 
ig 
Teliospores narrowly ellipsoid (16-24 X 48-55 y). 
Teliospores fusiform or lance-oblong (15-19 X 45- 
Op). 
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210. 
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Cannae. 
Cannae. 
. Cypripedii. 
Polygoni-amphibii. 
Acetosae. 
Polygoni-alpini. 
amphispilusum. 
Sommerfeltit. 
parcum., 
Polygoni-vivipari. 
Bistortae. 
punctiforme. 
Oxyriae. 
Guillemineae. 
Striolatum. 
obesisporum, 
Rivinae. 
modicum, 
tardissimum. 
Calthae. 
areolatum, 
calthaecola. 
Ormosiae. 
Oxalidis. 
Nolitangeris. 
Violae. 
Epilobii-tetragoni. 
Proserpinacae. 
Arracacharum, 
marylandicum. 
obscuratum, 
Pimpinellae. 
Pseudocymopteri. 
Cicutae. 
Ortonii. 
Gentianae. 
Convolvuli. 
jalapense. 
Lithospermi, 
Cressae. 
Giliae. 
fumosum. 
Cryptanthes. 
medellinense. 
. insititium. 
