144 PROCEEDINGS OF THE AMERICAN ACADEMY. 
M. Snodgrassii, nov. sp., perennans; radice crassa; caudice ramosa 
crassa nodosa plus minusve suberifera; caulibus pluribus erectis ramosis 
nodosis nunc geniculatis subscopariis teretibus striatulis glaberrimis 
3 dm. altis; internodiis perlongis (saepe 7 cm.); foliis crassiusculis, 
radicalibus spatulatis 1.6 em. longis, 6 mm. latis apice rotundatis 
caulinibus anguste linearibus obtusis vel acutis glaberrimis vel minu- 
tissime papillosis 1-2 cm. longis 1.2 mm. latis, umbellis 2-6 floribus 
sessilibus ; pedicellis 4-15 mm. longis capillaribus; sepalis_ ellipticis 
obtusis 3(—5)-nerviis 4 mm. longis staminibus 7 sepalis paulo super- 
antibus ; filamentis gracilibus glaberrimis ; ovario ovoideo obtusissimo 5 
stylis 3 filiformibus ; stigmatibus plus minusve elongatis subrecurvatis; 
capsula 3 mm. longa; seminibus subglobosis nigrescentibus glaberrimis 
lucidis sub lenti lineas concentrice curvatas exhibentibus. — ALBEMARLE 
Ist. : Elizabeth Cove, 15 February, 1899, Snodgrass & Heller, no. 268 
(hb. Gr.). Tagus Cove, 20 January, 1899, Snodgrass & Heller, no- 
914 (hb. Gr.) Narsorovcn Ist.: Mangrove Point, common, scat- 
tered everywhere in crevices of lava from near the beach to 600 m. alte, 
April, 1899, Snodgrass & Heller, no. 309 (hb. Gr., type) ; east side, Suod- 
grass & Heller, no. 921 (hb. Gr.). Endemic. Well marked among '% 
Galapageian congeners by its perennial habit, suberiferous base, long 
pedicels, large flowers, etc. 
Sesuvium, L. 
S. Epmonstonet, Hook. f. (3), 221; Anderss. (1), 225, & (2), 955 
Rob. & Greenm. (1), 146.— Gatapacos Ins.: Hdmonston (hb. Gr.) 
Habel. Barrineton Isu.: Baur, no. 151 (hb. Gr.). CHARLES IsL.: 
Goodridge. Garvner Isu.: Snodgrass & Heller, no. 638 (hb. Gr.). 
Seymour Ist.: north, Snodgrass & Heller, no. 561 (hb. Gr.). Endemic. 
S. PorruLacastrum, L. Syst. Nat. ed. 10, 1058 (1760). S. Portu- 
lacastrum, var. revolutum, Sims, Bot. Mag. xli. t. 1701. Portulaca 
Portulacastrum, L. Sp. 446 (1753).— ALBEMARLE ISL. : Elizabeth 
Cove, Snodgrass & Heller, no. 265 (hb. Gr.). Seymour Ist.: north, 
Snodgrass & Heller, no. 561 (hb. Gr.). Further distrib. 8. United 
States, Mex., W. Ind., S. Am., China, ete. 
TriantHemMaA, L. 
T. Porruracastrum, L. Sp. 223 (1753); Moench, Meth. 700. 
T. monogyna, L. Mant. i. 69 (1767); DC. Pl. Gras. t. 109; Anderss: 
(1), 225, & (2),°95; Rob. & Greenm. (1), 146. — BARRINGTON IsL. : 
