ROBINSON. — ALSINEA, 311 
S. gracilis. Low, glabrous, 2-6 inches in height, diffusely 
branched: leaves }-1 inch in length: stipules deltoid: flowers small, 
subglobose, 1-1} lines in diameter, not closely aggregated ; pedicels 
2-3 lines long: sepals elliptic ovate, a line or less in length, thick 
in the middle but scarious-margined: valves of the capsule a third to a 
half longer than the sepals ; seeds angled, somewhat triangular in out- 
line, finely but distinctly roughened. — Lepigonum gracile, Wats. Proc. 
Am. Acad. xvii. 367. Tissa gracilis, Britton, Bull. Torr. Club, xvi. 
128. — Sandy ground, dried ponds, etc. Dallas, Texas, Reverchon, 
S.tenuis. Dichotomously much-branched, becoming 8-10 inches 
in height, somewhat glandular-puberulent or pubescent above: leaves 
6-10 lines long: the very numerous flowers somewhat larger than in 
the last and inclined to be closely grouped; capsule twice the length 
of the ovate-oblong sepals. — Lepigonum tenue, Greene, Pittonia, i. 
63.  Tissa tenuis, Greene ex Britton, Bull. Torr. Club, xvi. 128. 
T. diandra?, K. Brandegee, Zoe, iv. 84. — California near Alameda, 
Greene, Mt. Eden and Tulare, Mrs. Brandegee. The affinities of 
this species are almost equally with S. salina, Presl, and S. diandra, 
Boiss., and in a large series of specimens it may not be possible to 
distinguish it sharply from either. The flowers, however, are more 
humerous and smaller and the corolla less developed than in the former ; 
the habit also is much more branching. From S. diandra it differs in 
the usually much shorter pedicels of the closely aggregated and at 
first subcorymbosely arranged flowers. 
* * * Annuals or biennials, more decidedly fleshy, usually of maritime or 
saline habitat: flowers small or of medium size: corolla more or less con- 
spicuous, white or pink, less frequently pink-purple: stipules ovate or 
deltoid. 
S. salina, Presr. Commonly although not always pubescent: 
leaves often fascicled in the‘axils : sepals ovate to oblong-lanceolate, 
narrowed upward although obtuse at the summit, 2-2} lines long: 
petals pink : capsule equalling or a third to a half longer than the 
calyx : seeds turgid, obovate, usually roughened, less frequently nearly 
or quite smooth (var. leiospermum, N. E. Brown, Eng. Bot. Suppl.). 
— FI. Cechica, 95; Gray, Man. ed. 5, 95; Warming, Bot. Foren. 
Festkr. 1890, 238, fig. 20. S. Canadensis, Don, Mill. Dict. i. 426. 
S. rubra, var. marina, Gray, Man. ed. 1, 64. S. media, and var, 
macrocarpa, Gray, Man. ed. 5,95. Arenaria rubra, yar. marina, L, 
Spec. 423. 4. marina, Bigel. Fl. Bost. 109; Roth in Hornem. Fl 
Dan. xiii. t. 2231. Buda marina, Dumort. Fl. Belg. 110. Lepigo- 
