116 PROCEEDINGS OF THE AMERICAN ACADEMY. 
As to robustness and leaf-breadth the Galapageian specimen at hand 
appears to correspond most closely to the form P. Vaillantii, Roem. 
& Schultes, Syst. iii. 514 (1818), which is intermediate between the 
very slender typical form and the broad-leaved form which is often 
separated as P. zosteraceus, Fries, Nov. ed. 2, 51 (1828). 
Ruppia, L. 
R. maritima, L. Sp. 127 (1753); Reichenb. Ic. Fl. Germ. vii. t. 17, 
f. 26. —- ALBemaRLE Ist.: Elizabeth Bay, lava fields near the beach, 
Snodgrass & Heller, no. 938 (hb. Gr.). Widely distributed. A species 
not hitherto recorded on the Galapagos Ids. 
NAJADACEAE. 
Nasas, L. 
N. marina, L., var. pATiroviA A. Br. ex Schum. in Mart. FI. Bras. 
iii. pt. 3,725 (1894); Rendle, Trans. Linn. Soc. ser. 2, v. 396, t. 39, 
f.11. W. latifolia, A. Br. Journ. Bot. ii. 276 (1864). — ALBEMARLE 
Ist.: Iguana Cove, Snodgrass & Heller, no. 940a (hb. Gr.). The 
material at hand varies somewhat as to the arming of the internodes. 
In some instances they are smooth, as in var. latifolia ; in other stems 
they are rather conspicuously armed. There is reason to believe that 
this is. individual variation, and the long rather broad many-toothed 
leaves are those of var. latifolia. Further distrib. trop.-S. Am. 
GRAMINEAE. 
ANTHEPHORA, Schreb. 
A ELeGans, Schreb. Beschr. Griis. ii. 105, t. 44 (1810); Kunth, 
Enum. i. 169; Anderss. (1), 141, & (2), 48; Rob. & Greenm. (1), 149. 
? A. cuspidata, Anderss. ll. cc. (differences not greater than in the 
various continental forms, which have not yet been successfully sepa- 
rated). — Cuarves Ist.: Andersson (hb. Gr.); Baur, no. 346 (hb. 
Gr.), subglabrous form. Cuatuam Ist.: northern part, Baur, no. 
347 (hb. Gr.), also subglabrous. InpEFraTIGABLE Isx.: Andersson 
(form A. cuspidata). James Ist.: on James Bay, Snodgrass & Heller, 
no. 397 (hb. Gr.). Further distrib. Mex., W. Ind., S. Am. 
Aristipa, L. 
A. pivorsa, Anderss. (1), 143, & (2), 49; Rob. & Greenm. (1), 149. 
— Auinepon Isi.: Snodgrass & Heller, no. 809 (hb. Gr.). BrNDLOE 
