312 PROCEEDINGS OP THE AMERICAN ACADEMY. 



num salinum, Fries, Mant. iii. 34. L. marinum, Kindberg, 1. c. 18. 

 L. medium, Wats. Bibl. Index, 103 in part. Tissa marina, Britton, 

 1. c. xvi. 126. — Common on both the Atlantic and Pacific coasts, also 

 occurring upon the Gulf coast, and not infrequent about salt lakes 

 and in alkaline regions of the interior, especially westward. 



"Var. ? minor. Smaller, 2-3 inches high : flowers smaller and 

 very numerous, on short pedicels (J-2 lines in length) and conse- 

 quently rather densely aggregated. — Buda marina, var.? minor, Wats. 

 in Gray, Man. ed. G, 90. — Coast of New Hampshire and Massachu- 

 setts. An ambiguous form suggesting the western S. tenuis but smaller 

 and with a better developed corolla. 



S. borealis. More slender and in well developed specimens more 

 diffusely branched than the preceding, 2-5 inches high, glabrous : leaves 

 opposite, seldom fascicled ; stipules ovate, broader than long, obtuse 

 or obtusish : sepals ovate, 1-1^ Hues long, very obtuse : petals shorter, 

 white or pink : capsule ovate-oblong, usually nearly or quite twice as 

 long as the calyx ; seeds usually wingless and nearly or quite smooth. — 

 Armaria rubra, (3, Michx. Fl. i. 274. (Dr. Britton, who has examined 

 the type of Michaux's variety, pronounces it identical with this species.) 

 A. Canadensis, Pers. (Syn. i. 504), the oldest specific name, but not to 

 be selected for use under Spergularia, since S. Canadensis has been 

 used by Don (Mill. Diet. i. 426) for a " pilose " and " rather hispid " 

 plant, extending from " Canada to Carolina " and being doubtless 

 S. salina, Presl ; Leplgonum medium, Wats. Bibl. Index, 103 in 

 part. Tissa salina, Britt. 1. c. xvi. 127. Buda borealis, Wats. & 

 Coulter, in Gray, Man. ed. 6, 90. — Sea-beaches and tidal marshes, 

 Maine to Labrador. 



* * * * Stout and fleshy perennials of the Pacific slope : flowers large. 



S. macrotheca. Smooth to densely glandular-tomentose : stems 

 spreading, ascending, 8-15 inches in height; leaves linear, acute, 

 mucronate, 8 lines to 2 inches in length, about a line in breadth; 

 internodes more or less developed, usually |— 1 inch long : floral bracts 

 resembling the leaves : inflorescence inclined to be racemiform ; pedi- 

 cels 4-12 lines in length, spreading or more or less deflexed : sepals 

 lanceolate, acutish or somewhat attenuate to an obtuse point, thick 

 in the middle, nearly smooth or viscid-glandular, conspicuously mem- 

 branous-margined : petals roseate, shorter than the sepals : capsule 

 oblong-ovoid, acutish, nearly equalling the sepals. — Arenaria macro- 

 theca, Hornem. ex Cham. & Schlecht. Linnaaa, i. 53. Lepigonum 

 macrothecnm, Fisch & Mey. Ind. Sem. Petr. iii. 14 ; Kindberg, 

 Monog. 16, t. 1, f. 1 ; Wats. Bibl. Index, 103. L. Chllense, Fisch & 



