6 
POTENTILLA BLASCHKEANA Turez; Lehm. in Otto, Gart. & Blu- 
menz. 9: 506. 1853. 
Potentilla gracilis most authors, not Doug]. 
This differs from P. gracilis in stouter habit, ascending branches, 
larger flowers and broader leaflets, which are obovate, deeply 
toothed or cleft into ovate or oblong teeth, silky and green above, 
silky and tomentose beneath. It must be admitted that this 
species is near to the preceding. . It was merged therein by Wat- 
‘son, but it is evidently not so near P. gracilts as is P. pulcherrima, 
which differ only in the form of the teeth. 
P. Blaschkeana is common from California to Wyoming and 
northward:-as far as Kodiak, off Alaska. 
~POTENTILLA CANDIDA n. Sp. _- 
Potentilla gracilis var. Wats. King’s Exp. 5: 88. 1871. 
Stem low, I~2 dm. high, densely white silky-strigose ; stipules 
ovate, entire, nearly 1 cm. long; leaves on rather short petioles, 
densely silvery silky on both sides, digitate; leaflets 7-9, obovate 
in outline, 2-4 cm. long, rather thick, deeply incised or cleft into 
large oblong teeth; cyme rather dense; flowers about I cm. in 
diameter; calyx white-silky ; bractlets lanceolate, much shorter 
than the ovate sepals; petals yellow, obcordate, a little exceeding 
the sepals. (Plate 287.) 
It resembles most a depauperate P. Blaschkeana, and differs 
mainly in the pubescence which is very dense on both sides of the 
leaves, and silky ; tomentum none. 
Nevada: S. Watson, no. 337, 1868 (type). Montana: F. 
V. Hayden, 1860. Wyoming: T.C. Porter, 1873. 
POTENTILLA FLABELLIFORMIS Lehm. Stirp. Pug. 2: 12. 1830. 
Potentilla gracilis flabelliformis Nutt.; Torr & Gray, Fl. N. Am. 
1: 440. 1840. 
This stands nearest to P. Blaschkeana, but I think it is without 
‘doubt a good species. I have had the opportunity to watch the two 
in the field and found them often grow together, but never found _ 
an intermediate form, and in all the collections that have gone — 
through my hands there are only the specimens from one locality, 
where I am in doubt to which species to refer them, and these _ 
may be hybrids. P. flabelliformis differs from the related species : 
