MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 97 
Dr. Lehmann held that Jacquin’s figure represented the typical Linnaean species. Tor. 
rey and Gray, in Fl. N. Am., regarded P. Missourica as a synonym of the typical P. 
Pennsylvanica. I have therefore accepted that name for this very variable species. 
P. Pennsylvanica is generally erect, 4-8 dm. high and more or less woolly-tomen- 
tose. The leaves are truly pinnate, with 5-7 pairs of leaflets, which in the typical form 
are grayish tomentose beneath and nearly glabrous above, the broad oblong divisions 
with scarcely revolute margins. 
The typical P. Pennsylvanica is a comparatively rare plant, ranging in British 
America from Hudson Bay to the Rockies, and in these extends southward to Colorado. 
Potentilla Pennsylvanica strigosa Pursh. 
Potentilla Pennsylvania strigosa Pursh, Fl. Am. Sept. 356. 1814. 
Poir; Lam. Ene. Meth. Suppl. 4: 543; Don, Gard. Dict. 2: 557; Lehm. Mon. Pot. 
5d; Rev. Pot. 58; Dietr. Syn. Pl. 3: 186; Walp. Rep. 2: 32; Ann. 2: 479. 
Hat. Man. Ed: 2: 380; Ed. 3: 408; Torr. & Gray, Fl. N. Am. 1: 438; Gray, Am. 
Journ. Se. (II.) 33: 411 (Rep. 22); Proc. Acad. Phil. 1863: 61; Porter, U.S. Geol. Surv. 
1871 : 481; Coulter, ibid., 1872: 756; Wats. Proc. Am. Acad. 8: 554; Porter & Coul- 
ter, Syn, Fl. Colo. 36 ; Coulter, Man. Rocky Mts. 84; Wats. & Coult. in Gray, Man. Ed. 6: 
159; Rydb. Cont. U. 8. Nat. Herb. 3: 157 and 496; Fl. Neb. 21: 16; Bull. Torr. Bot. 
Chub.23h 2635) Britt: & Brown, Ll; Hi 2 2214 
Lehm.; Hook. Fl. Bor. Am. 1: 188; Macoun, Cat. Can. Pl. 137 and 517; lLedeb. 
EI AWG. I< 306. 
Potentilla strigosa Pall.; Pursh, Fl. Am. Sept. 856. As synonym. 1814. 
Lessing, Linnaea, 9: 154; Tratt. Ros. Mon. 4: No. 3 
Potentilla pectinata Fisch.; Hook. Fl. Bor. Am. 1: 188. As synonym. 1835. 
Potentilla rubricaulis Doug]. ex Lehm. Rey. Pot. 58. 1856. Not Lehm. 
Potentilla absinthiifolia Dougl. ex Lehm. Rey. Pot. 58. 1856. 
InLustRAtTions: PLATE 38, f. 2; dissection of flower, f. 3; pistil, f. 4; stamen, f. 5; 
fruiting hypanthium and calyx, f. 6. 
Stem generally lower; pubescence mixed with long rather spreading villous hairs. 
Leaflets deeply divided into narrow lobes, which have revolute margins and are grayish 
tomentose beneath and more or less villous above. 
This is the most common form of P. Pennsylvanica, found in the same range as the 
species, but also extending over the plains to Kansas and New Mexico. Also in north- 
ern Asia. 
