127 



Monog. 1 8, at least in so far as the North American plants are 

 concerned, Lepigomim medium. Fries and L. leiospermum,¥J\ndh. 

 1. c. 23). 



Stout, erect or ascending, smooth or glandular-pubescent ; 

 capsule 5-8 mm. long at maturity ; pedicels short (seldom more 

 than twice this length) ; seeds smooth, margined or marginless, 

 or roughened with projecting points or processes, several kinds 

 sometimes found within the same capsule ; leaves often much 

 clustered in the axils. 



Hab. Along the whole coast on both sides of the continent, 

 apparently less abundant on the Gulf of Mexico ; also about 

 saline lakes and on alkaline soil in the interior. 



2. TiSSA SALINA (Presl.) [Spergiilaria salina, Presl. Fl. 

 Cech. 93 {iZig,) fide Kindberg. 



Slender and spreading, low, abundantly branching, generally 

 diffuse, and apparently always so in its fully developed state, 

 entirely smooth ; pedicels long, slender, more than twice the 

 length of the capsule, which is 4-6 mm. long at maturity and 

 twice the length of the calyx ; leaves generally simply opposite ; 

 seeds papillose or smooth. 



Hab. In the sand or mud of sea-beaches, more rarely (if at 

 all) on the meadows, coast of New England and Canada. Not seen 

 from further south than Eastport (Farlow) or South Gouldsboro 

 (Redfield). 



This is an extremely well marked species, as I understand it, 

 and I have little doubt that it is the same thing that occurs on 

 the shores of northern Europe, although comparison with more 

 European specimens is very desirable. This restricts its range 

 much within the limits assigned by Kindberg, who by going 

 mainly upon the seeds has included in this, as in other species,. a 

 large number of diverse elements. Certainly in these two species 

 the seed characters are of but little value. 



* * Species of non-saline distribution. 

 t Petals pink. 



3. TisSA RUBRA (L.) {Arenaria rubra, L. 1. c. ; Spergularia 

 rubra, Presl ; Lepigonum rubruin, Fries). 



Depressed, spreading or ascending, very leafy to the flowers ; 

 stipules ovate-lanceolate, acuminate ; plants smooth or but 

 slightly pubescent. 



