68 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



Ncrada: S. Watson, No. 337, 1868 (type). 



.Montana: F. V. Hayden, 1860; Rydberg, No. 2687, 1895. 



Wyoming: T. C. Porter, 1873. 



47. Potentilla gracilis Dougl. 



PokntiUa gracilis Dougl.; Hook. Bot. Mag. jj/. ^'9S4. 1829. 



Don, Gard. Diet. 2 : 554 ; Dietr. Syn. PI. 3 : 182 ; Walp. Rep. 2 : 33 ; Ann. 2 : 

 493 ; Lehm. Rev. Pot. 107. 



Torr. & Gray, Fl. N. Am. 1 : 440 ; Eat. Man. Ed. 7 : 457 ; Eat. & Wr. N. Am. 

 Bot. 373 ; Torr. Bot. U. S. Expl. Exp. 239; Rothrock, U. S. Geol. Surv. 4 : 113; Wats. 

 Proc. Am. Acad. 8 : 557 (in part); Brewer & Wats. Bot. Cal. 1 : 179 (in part); Gray, 

 Proc. Am. Acad. 8 : 381; Coop. Pac. R. R. Rep. 12 : Book 2, Part 2: 48 (?); Rydb. 

 Bull. Torr. Bot. Club, 24 : 5. 



Hook. Fl. Bor. Am. 1 : 192 ; i\lacoun, (Jat. Can. PL 138 and 517 (in part). 



Illi'steatioxs : Bot. Mag. pi. 29S4.. Plate 24, f- 1, 2, dissection of flower, /. 3 ; 

 stamen, /. 4 ; pistil, /. 5 ; fruiting hypanthium and calyx, /. 6. 



Stem 4-7 dm. high, slender, slightly silky- villous, with erect or ascending branches ; 

 stipules lanceolate, 1-3 cm. long, entire, or Avith 1-2 teeth. Basal leaves with slender 

 petioles 1-1.5 dm. long, digitate with 5-7 leaflets, green and nearly glabrous above, densely 

 and finel}' white-tomentose beneath ; leaflets 3-6 cm. long, oblanceolate, divided about 

 half-way to the midrib into lanceolate triangular coarse teeth. Stem leaves similar but 

 with shorter petioles. Cyme rather narrow. Hypanthium long-silky, in fruit 8-10 mm. 

 in diameter. Corolla 15-20 mm. in diameter; petals obcordate, deeply emarginate, 

 much exceeding the sepals. Bractlets lanceolate, a little shorter than the ovate acuminate 

 sepals. 



The true P. gracilis is a very rare plant and is conflned to the northern Pacific Coast. 

 What has gone under this name is either P. pulclicrrima or the next following species. It 

 differs from both in the narrow leaflets, which are oblanceolate, acute and coarsely 

 toothed with triangular teeth of the same form as in P. recta. The leaves are only slightly 

 silky above and finely tomentose beneath, and the branches of the cyme are very slender 

 and erect. The following specimens have been examined : 



Oregon: Scouler; Douglas; Nuttall; Tolmie, 1851; E. Hall, No. 136, 1871; T. 

 Howell, 1882; W. H. Suksdorf, Nos. 325 and 2491, 1896. 



Wa.<:hingfon: Dr. Ruhn; Wilke's Expedition, No. 141 ; G. H. Hicks, No. 216, 1890; 

 W. G. Edwards, 1896; T. Kincaid. 



Vancouver hiand : John Macoun, 1887 ; No. 182, 1893. 



Kodialc Island : (Collector not given). 



