90 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
Tagus Cove, trees and bushes in tufaceous soil around the base 
of the mountain. In protected places in canyons it sometimes 
attains a height of over 20 ft. (no. 1841). Cartes IsL.: 
low trees and bushes on the lower parts (no. 1843). INDE- 
FATIGABLE Is_.: Academy Bay, bushes and small trees form- 
ing dense thickets in the vicinity of the shore (nos. 1844- 
1845); southeast side, bushes and small trees common below 
500 ft. (no. 1846). James Ist.: James Bay, Andersson; 
Orchilla Bay, Baur. Endemic. 
Croton bushes form one of the most striking elements of the 
flora of the dry region and it is seldom that one can go very 
far away from the shore without encountering thickets of them. 
The bark is grayish white and the leaves grayish green in 
color, on most of the varieties found on the lower parts of the 
islands. The characteristically gray color of the vegetation in 
the dry regions is largely due to the number of these bushes. 
In general C. Scouleri and the varieties albescens and Mac- 
raci are found in the dry regions, var. brevifolius in the transi- 
tion region, and varieties grandifolius and glabriusculus in the 
moist regions, with occasional overlapping of the varieties as 
mentioned above. 
Euphorbia L. 
E. amplexicaulis Hook. f. (3), 183; Rob. (1), 166.—AB- 
INGDON IsL.: occasional low shrubs near the shore (no. 1847). 
BINDLOE Ist.: low shrubs in tufaceous soil near the shore (no. 
1848). Brattre Ist.: (no. 1849). CuHatuam Isi.: Dar- 
win. DapPHNeE Isu.: (no. 1851). GarpDNER IsL. (near 
Cuarzes Ist.): (no. 1850). INDEFATIGABLE IsL.: north 
side, common on sand beaches (no. 1852). JAmes IsL.: ona 
small islet about one-half mile off the northeast side (no. 
1853). SEymour IsL., soutH: Snodgrass and Heller. TOWER 
IsL.: occasional low shrubs on the tops of cliffs (no. 1854). 
WenMAN Isx.: (no. 1855). This species is always found in 
close proximity to the shore. Endemic. 
E. apiculata Anderss. (1), 234, (2), 101; Rob. (1), 166.— 
CHATHAM Ist.: Andersson... Endemic. 
E. articulata Anderss. (1), 236, (2), 102, t. 12, f. 2; Rob. 
(1), 166.—Axincepon Ist.: low bushes on lava beds on the 
lower parts of the island (no. 1856). ALBEMARLE IsL.: 
