144 PROCEEDINGS OF THE AMERICAN ACADEMY. 



M. Snodgrassii, nov. sp., perennans ; radice crassa ; caudice ramosa 

 crassa nodosa plus minusve suberifera; caulibus pluribus erectis ramosis 

 uodosis nunc geniculatis subscopariis teretibus striatulis glaberrimis 

 3 dm. altis ; iuternodiis perlougis (saepe 7 cm.) ; foliis crassiusculis, 

 radicalibus spatulatis 1.6 cm. longis, 6 mm. latis apice rotundatis 

 caulinibus anguste linearibus obtusis vel acuLis 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 ; 

 stylis 3 filiformibus ; stigmatibus plus minusve elongatis subrecuiwatis ; 

 capsula 3 mm. longa ; seminibus subglobosis nigrescentibus glaberrimis 

 lucidis sub lenti lineas concentrice curvatas exhibentibus. — Albemarle 

 Isl. : Elizabeth Cove, 15 February, 1899, Snodgrass & Heller, no. 268 

 (hb. Gr.). Tagus Cove, 20 January, 1899, Snodgrass & Heller, no. 

 914 (hb. Gr.). Narborough Isl.: Mangrove Point, common, scat- 

 tered everywhere in crevices of lava from near the beach to 600 m. alt., 

 April, 1899, Snodgrass & Heller, no. 309 (hb. Gr., type) ; east side, Snod- 

 grass & Heller, no. 921 (hb. Gr.). Endemic. Well marked among its 

 Galapagcian congeners by its perennial habit, suberiferous base, long 

 pedicels, large flowers, etc. 



Sesuvium, L. 



S. Edmonstonei, Hook. f. (3), 221; Anderss. (1), 225, & (2), 95; 

 Rob. & Green m. (1), 146. — Galapagos Ids.: Edmonston (hb. Gr.) ; 

 Habel. Barrington Isl.: Baur, no. 151 (hb. Gr.). Charles Isl. : 

 Goodridge. Gardner Isl.: Snodgrass & Heller, no. 638 (hb. Gr.). 

 Seymour Isl. : north, Snodgrass & Heller, no. 561 (hb. Gr.). Endemic. 



S. Portulacastrum, 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 Isl. : north, 

 Snodgrass & Heller, no. 561 a (hb. Gr.). Further distrib. S. United 

 States, Mex., W. Ind., S. Am., China, etc. 



Trianthema, L. 



T. Portulacastrum, L. Sp. 223 (1753); Moench, Meth. 700. 

 T. monogyna, L. Mant. i. 69 (1767) ; DC. PI. Gras. t. 109; Anderss. 

 (1), 225, & (2), 95; Hob. & Greenm. (1), 146. — Barrington Isl.: 



