170 AUT. BOT. 
Potentilla comarum Dec, Europe and Sibiria. 
This G. differs fram Potentilla by a large spon- 
giose gynophore andpetalsacuminate. Pancovia 
of Heister and Adanson would be the best 
name unless Arum becomes again Arisarum 
as in Tournefort ; but W. has a Pancovia. 
1246, Com. tomentosa Raf. var. villosum 
Pers. more robust than last,with broader Yeaves 
obl. ellipt. tomentose beneath—North Europe 
1247, Com. digitatum Raf. fl. tel. 199—bo- 
real America to New York, blended with last 
by our botanists. very distinct by leaves obl or 
lanceol. smooth, large flowers &c. 
1248, Com. angustifolium R. fl. tel. 200, 
Origon and Boreal America, Ohio: very pecu- 
liar, leaves narrow smooth, fl. small &c. 
1249, Var. parvifolium Raf. folioles 5-7small 
smooth cuneate or elliptic, petiols membranose, 
flowers very small, branches uniflore ; Labra- 
€ 3 to 10 inches high, folioles less than un- 
cial. 
1250, Dryas integrifolia Vahl. tenella 
Pursh—Canada, Labrador, Norway. Leaves 
ovatobl. acute, base cordate, margin revolute. 
1251, Dryas crenata Raf. Spetala O.—Alps, 
Canadas leaves subcordate elliptic obt. crenate 
aoe or crenate serrate: both sp. have 8 pe- 
tals. 
1252, ArcHEMILLA alpina O— Alps, Canada, 
Mts. of New England. 
1253, Alch. vulgaris O—Labrador,Europe. 
1254, Alch. pubescens Liam. hybrida of others 
Europe. 
1255, ArnawEs arvensis L. Alchem. Apha- 
nes Lam. ; 
1256, Porerrom angustifolium Raf. caule 
sulcato folioso, stipulis cristatis, foliolis 5-9 lin- 
