434 



P. millefolia most resembles P. Plattcnsis, but differs in the long 

 and very narrow segments of the leaves, the reflexed fruiting calyx 

 and the longer sepals. The following specimens have been ex- 

 amined : 



California: J. G. Lemmon, 1873, 1874, and no. 86, 1875 (Type); 

 E. L. Greene, no. 750, 1876; J. W. Congdon, no. 277, 1880. 



PoTENTiLLA MULTijUGA Lehm. Rev. Pot. 29, 1856. 



This species has been lost for about 40 years. As in the col- 

 lections of this country there were no specimens of a Potcntilla 

 whose leaves resembled those of Lehmann's plate, and as those 

 of the latter resembled the leaves of Horkelia aineata, most botan- 

 ists have cited P. vuiltijiiga as a synonym of that species, and 

 even Professor Greene, in Flora Fransiscana, has adopted the 

 name. It is not very likely that such an acute observer and 

 eminent botanist as Dr. Lehmann would have figured a Hor- 

 kelia with true Potentilla flowers. In two collections, viz., those of 

 the National Herbarium and the herbarium of Harvard University, 

 I have found a Potentilla that answers Lehmann's description and 

 plate, except that the plant is more rank and the leaflets are 

 larger, more irregular in form and position. 



P. nmltijuga resembles much P. Plattensis, but the leaflets are 

 more numerous, 8-13 pairs, obovate-cuneate and toothed only 

 toward the apex, and the sepals broader ovate and abruptly con- 

 tracted at the apex. The leaflets in Lehmann's figure are about 2 

 cm. long; some in the latter specimens are nearly y^ decimeter. 

 Lehmann's figure illustrates an undeveloped specimen about 2^ 

 dm. high. Some of the better developed specimens are ^ m. 

 high, with leaves 3 dm. long. 



Potentilla Drummondii Lehm. Nov. Stirp. Pug. 2 : 9. 1830. 



Watson included this in P. dissecta. As he had only compara- 

 tively poor specimens, with few, more approximate leaflets, it was 

 not strange that he did so, especially with his tendency of uniting 

 forms somewhat related. Had he had such specimens as those 

 collected by Suksdorf, or the one from which Lehmann's figure was 

 drawn, I doubt if he had done it. Such well-developed speci- 

 mens have pinnate leaves of 3-5 rather distant pairs of leaflets, 



