100 PITTONIA. 
* Flowers scattered, solitary in the forks and at the ends of 
the repeatedly dichotomous elongated branches. 
“I. P. Catrrornica = Horkelia Californica, Cham. & 
Schlecht. in Linnea, ii. 26 (1827); Brew. & Wats. Bot. Cal. i. 
181, excluding the variety sericea and the synonymy.—-A 
large and eoarse species, the bracts of calyx, commonly 3- 
toothed, sometimes 5-toothed, are even larger than the seg- 
ments. The herbage is glandular and, when fresh, yields a 
strong fragrance like that of Gnaphalium polycephalum or 
G. decurrens. The species is common in the Mission Hills 
of San Francisco, on whatever lots or tracts of ground are 
fenced away from the inroads of cows and goats, It is also 
abundant along streamlets for twenty miles southward and as 
far northward of the Bay. It can not be identified from the 
description in the Botany of the State Geological Survey, 
which appears to have been drawn mainly from the wholly 
distinet Horkelia cuneata, Lindl. which is also there confused 
with the still more dissimilar H. Kelloggii, Greene. What- 
ever the Potentilla multijuga of Lehmann may be, it is evident 
it can not be the plant of Chamisso, for it is represented with 
a somewhat closely cymose inflorescence and cyathiform calyx. 
Any supposition of its being of the Horkelia phase of the 
genus involves an improbable oversight of the author and 
artist regarding the filaments, for they are represented as fili- 
form. But the foliage and the habit are truly those of H. 
cuneata ; yet, since Lehmann knew and accepted Horkelia as 
a genus, he could not easily have made or allowed this mis- 
take; and his P. mullijuga may yet be proven a true species 
- of typical Potentilla, such as the figure most clearly indicates 
it to be. 
“2. P.ELATa. Two or three feet high, erect, rather softly 
hirsute throughout, the inflorescence glandular : radical leaves 
a foot long, leaflets in 7—9 pairs, thin, flabelliform, repeatedly 
incisely cleft: flowers solitary, in the upper axils, and termi- 
nal in threes ; bracts of the calyx equalling the segments, all 
