Vol. I] STEWART— BOTANY OF THE GALAPAGOS ISLANDS 117 



entirely shut off from the action of the southeast swell. In 

 regard to the distribution of mangroves Schimper, Pflanzen- 

 geographie, 437, says : "Within the tropics its distribution 

 nearly agrees with that of the rain forests. The mangrove is 

 absent or poorly developed on coasts the inland vegetation of 

 which possesses a xerophilous character, except where, as at 

 the mouth of the Indus and other large rivers, there is a con- 

 siderable freshening of the sea water." The vegetation of the 

 interior, along the north shore of this island, is xerophilous in 

 the extreme, and with the exception of a few showers in the 

 spring and early summer no rain ever falls. James Isl. : com- 

 mon in swamps on the south shore, occasional on the north 

 shore. Narborough Isl. : forming large swamps of low trees 

 around the quiet shores of a shallow bay on the northeast side, 

 common at Mangrove Pt. Tower Isl. : a small patch on the 

 shore of the crater lake near the center of the island. No 

 mangroves occur on the shores of this island, (no. 3023). 



Epiphytic plants, other than marine algae, do not attach 

 themselves to the mangrove trees, although it is often the case 

 that non-halophytic plants, only a short distance away, are 

 heavily covered with lichens. Seedling plants are seldom seen 

 underneath mangrove trees the roots of which are exposed to 

 the action of sea water between tides, the reason for this being 

 that the embryo plants are carried away before they have time 

 to take root. Further distr. general on tropical shores. 



MYRTACEAE 



Eugenia L. 



E. Jambos L. Sp. PI. 470 (1753).— Chatham Isl. : Wreck 

 Bay, trees in gardens, introduced, (no. 3034). Widely dis- 

 tributed in tropical regions. 



Psidium L. 



P. galapageium Hook. f. (3), 224; Rob. (1), 182.— Abing- 

 don Isl. : occasional small trees, 500-1000 ft., on the south- 

 west side of the island. On the south and southeast sides the 

 species apparently does not occur below 1000 ft., (no. 3030). 

 Albemarle Isl. : Banks Bay, at 2300 ft., according to F. X. 

 Williams; Cowley Bay, low bushes at 1250 ft. At 2000 ft. 



