245 
In the glandulosa group, Dr. Watson includes only two 
species, viz., P. arguta and P. glandulosa. Lehmann acknowl- 
edged’ five American species. Of these five, P. drevifolia Nutt., 
must be excluded as the style is not basal. For my part, I think 
the group contains at least seven or eight species. The addi- 
tional species were not known to Lehmann, except P. glutinosa 
Nutt., which he included as a variety under P. fissa Nutt. 
The group is characterized by an erect habit, more or less 
glandular pubescence, pinnate leaves with rounded or rhomboidal, 
coasely toothed leaflets, obovate or orbicular, not emarginate — 
petals, very flat anthers, and a nearly basal style, this last char- 
acter, as far as I know, not being found elsewhere in the genus. 
In all except one, the style is also fusiform, z. ¢., swollen near the 
middle and tapering to both ends. The species belonging to the 
group are: 
POTENTILLA ARGUTA Pursh, Fl. Am. Sept. 736. 1814. 
Geum agrimonioides Pursh, Fl. Am. Sept. 351. 1814. Not 
Potentilla agrimonioides Bieb. 
This is the only eastern species of the group, extending from 
New Brunswick to District of Columbia, westward to the foothills 
of the Rocky Mountains, from Colorado, as far north as Fort Simp- 
son on the Mackenzie River, It differs from the rest by its pub- 
€scence, which is coarser, densely hirsute and glandular, by its 
dense and strict cyme, and its white flowers. Dr. Watson men- 
tions that in the Rocky Mountain region, there is found a form of 
P. arguta with bright yellow flowers. This is probably a mistake, 
and the specimens referred to belong to the next species. 
PoTENTILLA GLUTINOSA Nutt; Torr. & Gray, Fl. N. Am. 1: 446. 
1838. Asa synonym under 
P. fissa major Torr. & Gray, /. c. Not P. verna major Wahl. 
P. arguta Nutt. Journ. Acad. Phil. 7: 21. 1834. Not Pursh, 
1814, . , 
P. valida Greene, Pittonia, 3: 20. 1896. 
It most resembles P. arguta in habit, is fully as stout and as 
pubescent, but the pubescence is finer, the longer hairs villous 
rather than hirsute. The cyme is open in age, rather flat- 
topped, the pedicels longer, the sepals thinner and more acute, 
