36 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER. 
places where it occurs, (no. 1286). INDEFATIGABLE ISsL.: 
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. fluitans 
Retz. Obs. III. 8 (1783); Rob. (1), 122.—CuHartes Ist.: 
abundant on the sides of a moist cliff above a spring at 1000 ft. 
(nos. 1287-1288). CHATHAM Ist.: Wreck Bay, common in 
large bunches at 450 ft. (no. 1290). Duncan IsL.: common 
in bunches at 900 ft. (no. 1291). Hoop Ist.: on the margin 
of a mud lake acc. 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.—Barrineton Isu.: Snodgrass and Heller. 
CuHarwes Isx.: Andersson. CHATHAM IsL.: Wreck Bay, 
common in open places on the lower parts of the island, (no. 
1293). GarpNER Ist., (near Hoop Ist.) : dried remains of 
this grass were found in June (no. 1294). Hoop Ist.: 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 Ips., NoRTH and souTtH: Snodgrass and Heller. 
Robinson, I. 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. 
—CuHar tes Ist.: Andersson; Snodgrass and Heller. CHATH- 
AM IsL.: Andersson. Endemic. 
P. molle Sw. Prod. 22 (1788) ; Rob. (1), 123.—CHATHAM 
Isu.: 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 Isxt.: Snodgrass and Heller. CHARLES IsL.: in 
open places near the shore (no. 1300). CHATHAM ISsL.: 
