no MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



Don, Gard. Diet. 2: 558: Dietr. Syn. PI. 3: 187; Walp. Rep. 2: 32; Ann. 2: 481; 

 Lehm. Rev. Pot. G6. 



Hook. Fl. Bor. Am. 1: 189; Rydb. Bull. Torr. Bot. Club, 23: 434. 



PotentiUa disseda Wats. Proc. Am. Acad. 8 : 550 (in part) ; iNIacoun, Cat. Can. PI. 

 138 and 517 (in part). 



PotcntiJIa diversifoJia Gray, Proc. Am. Acad. 8: 381. 



Illustrations: Hook. Fl. Bor. Am. jj?. 65. Plate 47, f- 1; dissection of flower, /. 

 J; pistil, /. 3; stamen, /. i; fruiting hypanthium and calyx,/. 5. 



Stem erect, 3-6 dm. high, slightly hairy, few-leaved, branched above. Stipules 

 about 2 cm., ovate, lanceolate, acuminate, veined, subentire. Basal leaves with petioles 

 5-10 cm. long, slightly strigose, hairy, especially when young ; leaflets 2-5 pairs, some- 

 what crowded, often verticillate and the upper confluent, veined, 2-6 cm. long, obovate- 

 cuneate, deeply and sharply toothed with linear-oblong or lanceolate acute teeth. Stem 

 leaves 1-5-foliolate, short-petioled or subsessile. Flowers long-pedicelled. Hypanthium 

 hirsute, veined ; bractlets lanceolate, shorter than the ovate-lanceolate acuminate sepals. 

 Petals 6-10 mm., obcordate, longer than the sepals. Stamens about 20. 



Watson included this in P. dissccta. As he had only comparatively poor specimens, 

 with few, more approximate leaflets, it was not strange that he did so, especially with his 

 tendency to unite forms somewhat related. Had' he seen such specimens as those col- 

 lected by Suksdorf, or the one from which Lehmann's figure was drawn, I doubt if he had 

 so referred it. Such well-developed specimens have pinnate leaves of 3-5 rather distant 

 pairs of leaflets, very large stipules resembling those of P. Plattensis and a large hypan- 

 thium which is strongly hirsute. From P. Plattensis and the other species of the group 

 it differs in the stoutness of the plant, and by the fewer (2-5 pairs) and larger leaflets, 

 which are from 3 to 6 cm. long, and the acute teeth. It is a rare species. The only 

 specimens seen are the following : 



Washington: W. N. Suksdorf, No. 539, 1875; 1885; Nos. 741 and 2487, 1896. 



Oregon: Elihu Hall, No. 135, 1871. 



California: J. G. Lemmon, No. 1200, 1875. 



British Columbia: John Macoun, No. 32, 1890. 



Rocky Mountains of British America : E. Bourgeau, 1858. 



97. PotentiUa multijuga Lehm. 

 Putentilla multijuga Lehm. Ind. Sem. Hort. Bot. Handb. 1849 : 6. 1849. 

 Lehm. Stirp. Pug. 9: 2 ; Rev. Pot. 29 ; Walp. Ann. 2 : 472; Rydb. Bull. Torr. Bot. 

 Club, 23 : 434. 



