THE VEGETATION OF THE SUMMIT OF MOUNT HAMILTON. 87 
sides at and near the summit; the large deep yellow flowers 
expanding just before nightfall. Itis probable that Steudel’s 
name for the species may be the older, and the one to be 
adopted. 
63. MENTZELIA DISPERSA, Wats. Proc. Am. Acad. xi. 187. 
A small-flowered species, scarcely more showy than n. 59. 
64. MICRAMPELIS FABACEA (Naud.), Greene, Pittonia, 
ii. 
65. Viota purpurra, Kellogg, Proc. Calif. Acad. 1 56. 
Scarcely more than a geographical sub-species of V. N’ uttallit, 
which is of the Rocky Mountain region. The V. aurea, 
Kell., commonly supposed to be the same as V. purpurea is 
really quite different, and probably not identical with the 
older V. preemorsa, to which it was joined in Dr. Gray’s 
latest enumeration of our violets. 
66. CARDAMINE CattrorNica (Nutt.), Greene, Fl. Fr. 266. 
67. Arapis Brewer, Wats. Proc. Am. Acad. xi. 123. On 
rocks, along the northward slope in various places. 
68. SrrepranrHus Murnprep#, Greene, Fl. Fr. 260. 
Plentiful along the Aquarius Road not far from the Spring. 
Closely allied to S. glandulosus, though that has flowers 
three times as large, of a bright purple color, these and the 
broad pods secund. The present new species, dedicated to 
Miss Mitprep Hotpen, has the small almost black flowers 
of the rare S. niger of Marin County. 
69. Brysimum asperum (Nutt.), DC. Syst. ii. 505. 
70. Barparga vuuearts, R. Br. Hort. Kew. 2 ed. iv. 109. 
One robust specimen, in fruit, observed on the rocky embank- 
ment below the Observatory, on the south side; probably a 
recent importation from the valley below. 
71. Brassica nara (Linn.), Koch, in Riehl. Deutsche 
Flora, iv. 713 (1833).. The Black Mustard; seen in only a 
few small specimens. 
