134 PROCEEDINGS OF THE AMERICAN ACADEMY. 
CHATHAM IsL.: southwest end, upper region, Baur, no. 286 (hb. Gr.). 
Endemic. 
P. uncinatum, nov. sp., glabrum lignoso-carnosum ; caulibus tereti- 
bus olivaceo-viridibus dichotomo ramosis; ramis arcuatis etiam teretibus 
gracilibus ; internodiis elongatis ; foliis oppositis breviter petiolatis 
lanceolatis vel ovati-lanceolatis integris 5-nervatis margine ad apicem 
falcato-uncinatam revoluta basi cuneata; spicis in dichotomis terminalibus 
elongatis saepius 7-nodosis ; floribus 4-seriatim immersis; calycis segmen- 
tis late deltoideis obtusis. — NarBoroueH Isx.: southern part, common 
on “palo santo” and coffee trees, at 300 to 600 m. alt., April, 1899, 
Snodgrass & Heller, no. 325 (hb. Gr.). Endemic. Leaves 7 cm. 
long, 1.6 to 2.3 cm. broad. Spikes 7 cm. long, segments 1.5 cm. long ; 
sheath short, sharply 2-pointed. Puare 1, Fic. 1 
POLY GONACEAE. 
Potyeonum, L. 
P. acuminatum, HBK. Nov. Gen. & Spee. ii. 178 (1817); Meisn. 
in Mart. Fl. Bras. v. pt. 1, 14, t. 4, & in DC. Prodr. xiv. 114; Griseb. 
Fl. Brit. W. Ind. 161; Small, Monog. Gen. Polyg. 52, t. 13.— 
GaLapaGos Ips.: acc. to Griseb. 1. c. Further distrib. trop. S. Am., 
Centr. Am., W. Ind. 
P. GALAPAGENSE, Caruel (1), 624. Ee eoihiaaaes Ist.: Chierchia 
(hb. Kew.). Endemic. 
CHENOPODIACEAE. 
ATRIPLEX, L. 
A. sp. —InperatIGABLE Isx.: northern part, Snodgrass & Heller, 
no. 676 (hb. Gr.). Seymour Ist.: north, Snodgrass & Heller, no. 
571 (hb. Gr.). 
A. sp. — Wenman Ist.: Snodgrass & Heller, no. 9 (hb. Gr.). 
AMARANTACEAE. 
ALTERNANTHERA, Forsk. 
A. rapicata, Hook. f. (4), 261, 262; Anderss. (1), 164, & (2), 60, 
t. 3, f. 2.— A. acaulis, Anderss. (1), 164. — Cuatuam Isx.: Darwin ; 
in upper very dry region, Andersson (hb. Gr.). Hoop Ist.: Snod- 
grass & Heller, no. 753 (hb. Gr.). Endemic. 
