196 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. Fl. Bor. Am. 1: 186. In part. 



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. S. Dept. Agric. 3: 222. 1892. (Mainly.) 



Potentilla valida Greene, Pittonia, 3 : 20. 1896. 



Illustration : Plate 105, f. 1 ; dissection of flower, /'. 2 ; stamens, /. 3, 4. ; pistil, 

 /. 5 ; fruiting hypanthium and calyx, /. 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 about a third. Stamens about 25 ; anthers flat, slightly 

 cordate at base. Style fusiform. 



It most resembles D. argida 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 fi-om ^^ancouver Island and British Columbia to Wyoming and Utah. Specimens 

 examined : 



British Columbia : H. \^"yeth (sources of the Oregon, type) ; John Macoun. 



Washington: Suksdorf, 1884; No. 2211, 1893 (slender form); Mrs. Susan Tucker; 

 C. V. Piper, No. 1528, 1893^ (?); Kirk Whited, No. 110, 1896; No. 415, 1897. 



Oregon: Dr. Lyall, 1861; Spalding; W^ C. Cusick, No. 418, 1877. 



' Smaller form. 



