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



lower parts (no. 1224) ; northeast side, abundant on the flat 

 area near the shore (no. 1222) ; northwest side, common in 

 tufaceous soil (no. 1225). James Isl. : James Bay, Snodgrass 

 and Heller; northeast side, occasional in sand and in lava crev- 

 ices (no. 1226). Narborough Isl.: north side, abundant in 

 lava crevices (no. 1227). Seymour Ids., north and south: 

 Snodgrass and Heller. Further distr. S. Am. This is one of 

 the most abundant and wide spread grasses of the dry region. 

 It occurs commonly where the soil is too porous to support 

 much large vegetation, and in such situations it often covers 

 considerable areas. 



A. villosaRob. & Greenm. (1), 144, 149; Rob. (1), 117.— 

 Duncan Isl. : abundant on the lower and dry parts of the 

 island (nos. 1228-1229). Jervis Isl. : Baiir. Endemic. 



Bouteloua Lag. 



B. pilosa (Hook, f.) Benth. ace. to Watson, Proc. Am. Acad. 

 XVIII. 179 (1883). Eutriana pilosa Hook. f. (3), 173. B. 

 pilosa Benth. 1. c. : Rob. (1), 117.— Abingdon Isl.: occa- 

 sional in open places at 1050 ft. (no. 1230). Albemarle Isl. : 

 Iguana Cove, in spreading bunches among thick vegetation at 

 250 ft. (no. 1231) ; Tagus Cove, abundant in tufaceous soil on 

 the lower parts of the island (no. 1232) ; Villamil, occasional 

 m woodland at 250 ft. (no. 1233). Barrington Isl. : Snod- 

 grass and Heller. Chatham Isl.: north side, Andersson. 

 Indefatigable Isl.: north side, Snodgrass and Heller. 

 James Isl. : James Bay, Snodgrass and Heller. Jervis Isl. : 

 Baur. Narborough Isl. : north side, abundant on lava beds 

 near the shore (no. 1234). Seymour Ids., north and south : 

 Snodgrass and Heller. Endemic. 



Cenchrus L. 



C. distichophyllus Griesb. Cat. PI. Cub. 234 (1866); Rob. 

 ( 1 ) , 1 18. — Albemarle Isl. : Villamil, Baiir. Chatham Isl. : 

 Sappho Cove, forming dense mats on sand beaches (no. 1236). 

 Hood Isl. : fairly common on sand beaches (no. 1235). Fur- 

 ther distr. Cuba. 



C. granulans Anderss. (1), 140, and (2), 47; Rob. (1), 

 118. — Albemarle Isl. : Tagus Cove, common at 100-4000 ft. 



