36 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



places where it occurs, (no. 1286). Indefatigable Isl. : 

 north side, Andersson. James Isl. : James Bay, Snodgrass 

 and Heller. Further distr. Mex., W. Ind., S. Am. 



P. geminatum Forsk. Fl. Aeg.-Arab. 18 (1775). P. Huitans 

 Retz. Obs. III. 8 (1783); Rob. (1), 122.— Charles Isl.: 

 abundant on the sides of a moist cliff above a spring at 1000 ft. 

 (nos. 1287-1288). Chatham Isl.: Wreck Bay, common in 

 large bunches at 450 ft. (no. 1290). Duncan Isl.: common 

 in bunches at 900 ft. (no. 1291). Hood Isl. : on the margin 

 of a mud lake ace. to Snodgrass and Heller. The dry culms of 

 a grass, probably this one, were noticed in the dry bed of this 

 lake in June. Further distr. W. Ind., S. Am., Old World. 



P. hirticaulum J. & C. Presl, Rel. Haenk. I. 308 (1830); 

 Rob. (1), 122. — Barrington Isl.: Snodgrass and Heller. 

 Charles Isl.: Andersson. Chatham Isl.: Wreck Bay, 

 common in open places on the lower parts of the island, (no. 

 1293). Gardner Isl., (near Hood Isl.): dried remains of 

 this grass were found in June (no. 1294). Hood Isl. : abund- 

 ant (no. 1297). Indefatigable Isl.: Academy Bay, abund- 

 ant (no. 1297) ; north side, Snodgrass and Heller; northeast 

 side, common on the table land above the beach (no. 1296). 

 Seymour Ids.^ north and south : Snodgrass and Heller. 

 Robinson, 1. c, suggests that this grass is a recent introduction 

 to the islands. It might be mentioned in this connection that 

 the islands on which it occurs are frequently visited by the 

 inhabitants of both Albemarle and Chatham Ids. Further 

 distr. Mex. 



Var. minus Anderss. (1), 135, and (2), 44; Rob. (1), 123. 

 — Charles Isl. : Andersson; Snodgrass and Heller. Chath- 

 am Isl. : Andersson. Endemic. 



P. moUe Sw. Prod. 22 (1788) ; Rob. (1), 123.— Chatham 

 Isl. : Chierchia. Further distr. W. Ind., S. Am., tropical Asia. 



P. multiculmum Anderss. (1), 133, and (2), 43; Rob. (1), 

 123. — Albemarle Isl. : Iguana Cove, Snodgrass and Heller; 

 Turtle Cove, occasional in scant soil near the shore (no. 1298) ; 

 Villamil, occasional in lava crevices near the shore (no. 1299). 

 Barrington Isl. : Snodgrass and Heller. Charles Isl. : in 

 open places near the shore (no. 1300). Chatham Isl.: 



