151 AUT. BOT. 
simpl. subnudis trifloris. fol. radic. petiolatis 
quinatis subrot. foliolis sess. proximis obov. laci- 
niatis, ciliatis fol. caulinis sessil. ternatis parvis, 
stipulis obl. integris, calicib. obl. obtusiusc. pe- 
talis obcord. cal, subeq.—In Labrador, near P. 
emarginata Pursh, but several disparities,stems 
4 to 6 inches with only 2 leaves, flowers rather 
large pale yellow, perennial. 
1203, Pot. tridentata O. from Groenland to 
Matawan Mts. inthe South only on Mts. and 
larger, 4 to 8 inches high. flowers white. 
1204, Pot. pectinata Raf. Pensylv. La Tor. 
rare sp. of Canada and Boreal America, not of 
Pennsylvania: leaves hardly pinnatiform,rather 
digitate, 3-7folioles cuneate narrow pectinate, 
stipules lanceol. 2-3parted. stem bifurcate, calix 
linear lanceol. hirsute.; ‘The pensylvanica of 
Beck is‘a very different plant see 1244. 
1205, Pot. hirsuta Mx. O. Canada and Al- 
leghanies, stem simple erect often semipedal, in 
Labrador only 2 or 3 inches, annual. 
1206, Pot. cespitosa Raf. an villosa? Pursh. 
hirsuta cespitosa diffusa, fol. ternatis, radic. pe- 
tiol. foliolis sessil. obov. lacin. caulinis sessil. fo- 
liol. obl. stipulis membran. lato lanceol. pedunc. 
axil. et term. cal. obl. subeq. petalis obcord. cal. 
brevior—summits of Allegh. Mts. perennial. 
stems diffuse 2-4 inches long, it differs from P. 
villosa as described by leaves not tomentose, 
nor petals longer«han calix &c. 
1207, Pot. A, norvegica O, boreal Europe, 
Asia end America, here extending as far as Ca- 
rolina, large plant 2 or 3 feet high, it varies with 
leaves thin or broad and narrow. Of subg. 
Aplenta, 
1208, Pot. A. flexuosa Raf. glabriuscula, 
caule crasso flexuoso ramoso, fol. petiol. terna- 
