THE VEGETATION OF THE SUMMIT OF MOUNT HAMILTON. 85 
44, *CHENOPODIUM MURALE, Linn.1.c. The remark made 
above, concerning the two Amaranths, applies to these two 
cosmopolite Pigweeds. 
45. Lewista REDIvivA, Pursh, Fl. Am. Sept. ii. 368: L. 
alba, Kell. Proc. Calif. Acad. ii. 115. fig. 36. A somewhat 
rare plant in California, though common throughout a great 
extent of country lying to the northward and northeastward 
of our borders. 
46. CLAYTONIA NUBIGENA, Greene, Pitt. ii. 294. 
47. SEpuM RADIATUM, Wats. Proc. Am. Acad. xviil. 193. 
Mr. Watson’s account of the habit and duration of this 
species, unhappily repeated by me in the Flora Franciscana 
before I had yet seen the plant growing, is far from correct. 
The species is strictly annual; but it has the peculiar habit 
of propagating, as do several of our western and annual 
Saxifrages, by leafy plantlets which are formed in the axils of 
the lowest leaves before the parent plant dies. These, falling 
to the earth, put out their rootlets as soon as the autumn 
rains come, so that the observer, in winter, would naturally 
infer them to be young plants of some biennial species. It 
is common among rocks along the Aquarius Road, in com- 
pany with Arenaria macrophylla. 
48. CoryLEpon omsprrosa, Haworth, Misc. Nat. 180. 
49. Rises aLurinosum, Benth. Trans. Hort. Soe. i. 476 
Some fine specimens of this very ornamental wild currant 
grow at the Joaquin Springs. This is what has been 
commonly called Ribes sanguineum in California; but the 
middle Oalifornian shrub is too unlike the far northern type 
in size, pubescence, floral structure, etc., to be made a mere 
variety of it. It is a very good subspecies at the least. The 
racemes of large pink flowers, appearing in late winter and 
early spring, though beautiful indeed, are quite inferior to 
those of R. sanguinewm, which are almost blood-red. We 
have had both growing in the grounds of the University, 
and flowering and fruiting annually for years, the northern 
