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). Charles Isl. : 

 low trees and bushes on the lower parts (no. 1843). Inde- 

 fatigable Isl. : 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 Isl.: 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- 

 raei 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 Isl. : low shrubs in tufaceous soil near the shore (no. 

 1848). Brattle Isl.: (no. 1849). Chatham Isl.: Dar- 

 win. Daphne Isl.: (no. 1851). Gardner Isl. (near 

 Charles Isl.): (no. 1850). Indefatigable Isl.: north 

 side, common on sand beaches (no. 1852). James Isl. : on a 

 small islet about one-half mile off the northeast side (no. 

 1853). Seymour Isu, south: Snodgrass and Heller. Tower 

 Isl.: occasional low shrubs on the tops of cliffs (no. 1854). 

 Wenman Isl.: (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 Isl. : Andersson. Endemic. 



E. articulata Anderss. (1), 236, (2), 102, t. 12, f. 2; Rob. 

 (1), 166. — Abingdon Isl.: low bushes on lava beds on the 

 lower parts of the island (no. 1856). Albemarle Isl.: 



