REPORT OF THE BOTANIST. 107 
22. Peridia mostly in series; on both sides of the 
Meat iors Cpe ei kaw ¢ See oH oe 3 he dear Trivis 
22. Peridia not in series; on the under side of the 
deste: fea hondigdk i222 4 .ohs hos olsdak 23 
23. Spots large and generally confluent ... 24 
24 Pendia- crowded. . 2) «2 sath hd als PoporHyLut 
24. Peridia not crowded, irregular placed, Erigzronatum 
23. Spots small or medium, generally dis- 
hinetiedifeel sO ee eee 25 
mo: Veknieyieenthall yw tiie wn 28 ot ss AOE 26 
26. Crowded, leaf not pustulate on the 
opposite:side ti... ihe Cae HeELianrut 
26. Loosely placed, leaf distinctly pustulate 
on the opposite side 2.7.2.0. .20h. 2: TENUE 
25. Peridia extending to the margin............ 27 
27. Peridia distinctly lobed on the margin, Mart#—Wirsont 
27. Peridia indistinctly lobed, mostly seri- 
a ated along the mid-rib............ OsMoRRHIZE 
27. Peridia indistinctly lobed, not seriated, Orost 
21. Spots more or less stained with pur- 
plevor redsde2 a6 bie 28 
28. Spots large, pustulate, the center purple or 
browih. io heuds his oo a). ImpatTIENTIS 
28. Spots medium or small, scarcely pustulate ... 29 
29. Centrally:red. or.purplish. -\5 20. 42:0. Je? 30 
30. Mostly on the margin of the leaf or of its lobes, GERANIL 
20.-On any partiot the leaf... .........)..... men aes 31 
31. Peridia crowded, extending to the mar- 
PINDUP RAIS SL lath .- (dois er 6's soaalateng out GROSSULARLE 
31. Peridia central, few, mostly less than 
iwentyrermiets (26 dette sai. eat ComposITARUM 
31. Peridia central, many, mostly more 
thanstiwentyes Lvs ss Abs. se RG PENSTEMONIS 
29. With a red dash extending from the spot 
to the margin of the leaf; peridia 
NumMeroens, crowded 2°... .kasinesldei (ENOTHERE 
Some of the foregoing species are variable and will not in all 
cases rigidly agree with the characters here given, but a few 
explanations and a list of the plants on which the species are 
found, will remove nearly or quite all difficulties in tracing them. 
Eeidium, Berberidis sometimes has short peridia. I have seen 
but a single dried specimen of 4. Clematitis which is on a thick- 
ened petiole or stem. The color of the spot is taken from the 
description. I have seen but few poor specimens of 4. Orobi, 
and am not quite sure that they are rightly referred. .4. /mpa- 
tientis sometimes has the spots entirely yellow, and the same is 
true of 4. Geranii and 4d’. Compositarum. A’. Geranii also 
rarely has a purplish or yellow dash extending to the margin of 
the leaf. 
