434 
P. millefolia most resembles P. Plattensis, 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 Potentilla 
whose leaves resembled those of Lehmann’s plate, and as those 
of the latter resembled the leaves of Horkelia cuncata, most botan- 
ists have cited P. multijuga 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 //or- 
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. multyuga 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 1% decimeter- 
Lehmann’s figure illustrates an undeveloped specimen about 2% 
dm. high. Some of the better developed specimens are 34 ™- 
high, with leaves 3 dm. long. ‘ 
PorentiLLa Drummonpit 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, 
