80 ERYTHEA. 
particular summit; and its value as a contribution to the 
published knowledge of plant distribution on the Pacific 
Coast will be realized more fully after similar lists shall have 
been made upon the vegetation of other mountains of western 
California, such as Tamalpais, Diablo, St. Helena, and the 
Loma Prieta (Mount Bache). 
The species reasonably presumed to be adventive or 
naturalized on the summit are marked in the list by an 
asterisk. They are not numerous; and all of them save 
Matricaria discoidea, which is indigenous to our seaboard, 
are natives of the Old World, now extensively naturalized in 
California and elsewhere. Some of these, as the appended 
notes will show, were found only in one or two specimens, 
and only future years will tell whether or not all of them 
become truly permanent denizens of the place. It will also be 
observed that for a considerable number of native Californian 
plants, the known range has been greatly extended by this 
record of their occurrence on Mount Hamilton; and indeed 
that entire sub-range of mountains of which this is the 
highest peak, offers one of the most inviting of fields for 
botanical exploration. 
LIST OF SPECIES. 
1. Vrora trruncata, Nutt.; Torr. & Gray, Fl. N. Am. 
i. 270. 
9. Latuyrus vestirus, Nutt.; Torr. & Gray, Fl. N. Am. 
i. 276. 
3. PsoraLEA mMAcRosTacuya, DO. Prodr. ii. 220. Seen 
only at the Joaquin Springs. 
4. PsoraLEA PHYsopEs, Dougl.; Hook. Fl. Bor-Am. i. 
36. 
5. Lorus numistratvs, Greene, Pittonia, ii. 139. Appar- 
ently common, even to the summit. 
6. Lorus orasstroxtus (Benth.), Greene, Pittonia, ii. 147. 
Frequent on the northward slope near the summit. 
