Vol. I] STEWART-BOTANY OF THE GALAPAGOS ISLANDS 45 



LEMNACEAE 

 Lemna L. 

 L. minor L. Sp. PL 970 (1753).— Albemarle Isl. : Villa- 

 mil, common in pools of slightly brackish water near sea level 

 (no. 1100). Chatham Isl.: Wreck Bay, abundant on the 

 surface of pools and streams, 1000-1800 ft., (no. 1101). 

 Widely distributed. 



L. sp.. Wolf (1), 284.— Charles Isl. 



BROMELIACEAE 

 Tillandsia L. 

 T. insularisMez in DC. Monog. IX. 756 (1896) ; Rob. (1), 

 130. — Albemarle Isl.: Tagus Cove, rare above 2500 ft. on 

 the west side of the mountain; on the southeast side it often 

 covers the ground in great profusion over considerable areas; 

 Villamil, common on the branches of trees and on the ground 

 in vegetable mold, 350-1300 ft. Charles Isl.: common on 

 bushes, on small trees, among rocks in vegetable mold at 1400 

 ft. Chatham Isl. : Wreck Bay, among rocks in vegetable 

 mold, and covering the branches of Hippomane Mancinella 

 trees around 700 ft. Duncan Isl. : on rocks and in vegetable 

 mold, 1150-1250 ft. Indefatigable Isl.: Academy Bay, on 

 the branches of trees and in vegetable mold, 350-550 ft., (no. 

 1119) ; northwest side, occasional at 550 ft., abundant in the 

 region around 700 ft., where it often forms large patches on 

 the ground in places where the vegetation is not too dense for 

 its growth. James Isl. : James Bay, occasional on the sides of 

 the bluffs, 1300-1500 ft. Narborough Isl. : south side, upper 

 regions ace. to R. H. Beck. This is the only tank epiphyte 

 found on the islands. Specimens often contain as much as a 

 pint of water, from which they seem to obtain their entire sup- 

 ply of moisture during dry weather. The root system is so 

 poorly developed that a slight push will uproot a specimen 

 when found growing on the ground. Endemic. 



COMMELINACEAE 

 Commelina Plum. 

 C. nudiflora L. Sp. PL 41 (1753) ; Rob. (1), 130.— Abing- 

 don Isl.: common in the upper regions (no. 1122). Albe- 



