144 PROCEEDINGS OF THE AMERICAN ACADEMY. 



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

 crassa nodosa plus minusve suberifera; caulibus plurihus erectis raraosis 

 uodosis nunc geniculatis subscopariis teretibus striatulis glaberrimis 

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

 radicalibus spatulatis l.G cm. longis, 6 mm. latis apice rotundatis 

 cauliiiibus anguste linearibus obtusis vel acutis glaberrimis vel minu- 

 tissime papillosis 1-2 cm. longis 1.2 mm. latis, umbellis 2-G floribus 

 sessilibus ; pedicellis 4-15 mm. loiigis capillaribus ; sepalis ellipticis 

 obtusis 3(-5)-nerviis 4 mm. longis staminibus 7 sepalis paulo super- 

 antibus ; filamentis gracilibus glaberrimis ; ovario ovoideo obtusissimo ; 

 stjlis 3 filiformibus ; stigmatibus plus minusve elongatis subrecurvatis; 

 capsula 3 mm. longa ; seminibus subglobosis nigrescentibus glaberrimis 

 lucidis sub lenti lineas concentrice curvatas exliibeutibus. — 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 

 Galapageian congeners by its pereimial habit, suberiferous base, long 

 pedicels, large Hovvers, etc. 



Sesuvium, L. 



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

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

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

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

 Sey,a[our Isl. : north, Snodgrass &. Heller, no. 561 (hb. Gr.). Endemic. 



S. PoRTULACASTRUM, L. Syst. Nat. ed. 10, 1058 (1760). S. Portu- 

 lacastrum, var. revolntum, Sims, Bot. Mag. xli. t. 1701. Portulaca 

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

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



