Vor. I] STEWART—BOTANY OF THE GALAPAGOS ISLANDS IS 
north side, extending to above 1800 ft. according to F. X, 
Williams. Jervis Ist.: small trees on the lower parts (no. 
1771). NarsorouGH Ist.: north side, small trees on lava 
beds (no. 1772). Tower Ist.: small trees, much infested with 
lichens. This species forms one of the most common trees in 
the dry and transition regions on the islands where it occurs. 
It seldom attains a great height, usually having a broadly 
spreading crown and a short thick trunk. Its absence from 
Duncan Island is rather peculiar, as it is found on all of the 
adjacent islands, and the conditions here do not seem to be 
such as would inhibit its growth. Further distr. Mex., W. 
Ind., S. Am. to Peru. 
B. malacophylla Rob. (1), 160.—Srymour Ins., NortH (?) 
and souTH: Snodgrass and Heller. At both the times our 
party visited south Seymour, viz. in July and November, the 
Bursera trees were out of foliage. So far as is known this 
species does not occur on the north side of Indefatigable 
although this island is separated from Seymour by a channel 
which is only about a half mile in width and is probably of 
comparatively recent origin. Endemic. 
POLYGALACEAE 
Polygala L. 
P. Anderssonii Rob. (1), 160. P. puberula Anderss. (1), 
232, (2), 100.—INDEFATIGABLE IsL.: northwest side, Anders- 
son; Baur. Endemic. 
P. galapageia Hook. f. (3), 233; Rob. (1), 160.—Asinc- 
DON IsL.: fairly abundant on the lava beds on the lower parts 
(no. 1773). ALBEMARLE Ist.: Cowley Bay, not abundant 
(no. 1775) ; Tagus Cove, abundant from the beach to 600 ft. 
(no. 1774). BrnpiLoe IsL.: occasional in tufaceous soil near 
the shore (no. 1776). Cartes Ist.: Darwin; Andersson; 
Baur. CuatHam Ist.: Wreck Bay, abundant in sandy soil 
near the shore (no. 1777) ; north side, Baur. INDEFATIGABLE 
IsL.: north side, abundant in light ashy soil near the shore (no. 
1778) ; northwest side, abundant in tufaceous soil near the 
shore (no. 1779). James IsL.: northeast side, specimens seen 
at 200 ft. Jervis Ist.: Baur. Endemic. 
