L96 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
4. Drymocallis glutinosa (Nutt.). 
Potentilla arguta Nutt. Journ. Acad. Phil. 7: 21. 1834. Not Pursh, 1814. 
Hook: Fly Bors Ams) 186. Imipart: 
Potentilla fissa var. major Torr. & Gray, Fl. N. Am. 1: 446. 1840. Not P. verna 
var. major Wahl. 
Walp. Rep. 2: 35; Ann. 2: 477. 
Potentilla glutinosa Nutt.; Torr. & Gray, Fl. N. Am. 1: 446. As synonym. 1840. 
Potentilla glandulosa Holz. Cont. U. 8. Dept. Agric. 3: 222. 1892. (Mainly.) 
Potentilla valida Greene, Pittonia, 3: 20. 1896. 
InLustRaTIon: PLate 105, f. 1; dissection of flower, f. 2; stamens, f. 3, 4; pistil, 
f. 5; fruiting hypanthium and calyx, f. 6. 
Stem stout, tall, 4-10 dm. high, erect, striate, more or less pubescent with long, viscid 
or glandular, villous hairs, branched above. Stipules ovate, more or less toothed. Basal 
leaves pinnate; leaflets 3-5 pairs, more or less pubescent or glabrate, 3-6 cm. long, the 
terminal one broadly obovate, the lateral ones obliquely elliptic or nearly orbicular, all 
coarsely serrate and incised. Stem leaves similar but with fewer, more rhombic and acu- 
tish leaflets. Cyme open, with divergent branches, in fruit rather flat-topped. Flowers 
18-22 mm. in diameter. Hypanthium viscid-villous; bractlets lanceolate, about a third 
shorter than the ovate-lanceolate pointed sepals. Petals yellow, broadly elliptic or nearly 
orbicular, exceeding the sepals by abouta third. Stamens about 25; anthers flat, slightly 
cordate at base. Style fusiform. 
It most resembles D. arguta in habit, is fully as stout and as pubescent, but the hairs 
are 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, and the petals larger, 
generally much exceeding the calyx, and bright yellow. 
In Utah, Montana and Wyoming the plant is lower, more glabrous and with smaller 
flowers and approaches in habit both fissa and glandulosa. The form of the west slope 
has larger flowers than any of the species, is very stout and quite hairy. D. glutinosa 
ranges from Vancouver Island and British Columbia to Wyoming and Utah. Specimens 
examined : 
British Columbia: H. Wyeth (sources of the Oregon, type); John Macoun. 
Washington: Suksdorf, 1884; No. 2211, 1893 (slender form); Mrs. Susan Tucker ; 
C. V. Piper, No. 1528, 18931 (?); Kirk Whited, No. 110, 1896; No. 415, 1897. 
Oregon: Dr. Lyall, 1861; Spalding; W. C. Cusick, No. 418, 1877. 
1 Smaller form. 
