286 PROCEEDINGS OF THE AMERICAN ACADEMY. 
lanceolatum, Michx. Fl. i. 275. Micropetalon lanceolatum, Pers. 
Syn. i. 509. Arenaria calycantha, Ledeb. Mem. Acad. Petr. v. 534. 
A. lateriflora, Darlingt. Florula Cest. 54.— New England to New 
Jersey; Mendocino Co., Calif., and northward; flowering in mid 
summer; frequent. 
Var. corollina, Frenzt, |. c.i.382. Taller: inflorescence spread- 
ing and more definitely terminal: bracts reduced, the uppermost more 
or less scarious: petals usually present: seeds slightly roughened. — 
S. brachypetala, Bong. Sitch. 126; Torr. & Gray, Fl. i. 186. S. alpes- 
tris, Fries, Mant. i. 10, excl. var. S. Fenzlii, Regel, Ost-Sib. i. 399. 
S. borealis, var. alpestris, Gray, Man. ed. 5, 93. — Lake Superior, 
Robbins, to Oregon, Howell, and northward. (Europe and Asia.) 
S. crassifolia, Euru. Low, smooth: stems many, weak, 
ascending or suberect, internodes short: leaves small, numerous, thick- 
ish, oblong-lanceolate, acutish, 3-6 lines in length: sepals ovale 
lanceolate, acuminate, somewhat exceeded by the petals and capsule: 
seeds distinctly roughened under a lens. — Beitr. iii. 60; Fenzl, |. & 
i. 883; Chapm. Fl. ed. 2, 608; Wats. & Coulter in Gray, Man. ed. 6, 
87, excl. Kentucky plant. S. gracilis, Richardson, Frankl. Journ. 
‘738; Hook. Fl. Bor.-Am. i. 97; Torr. & Gray, Fl. i. 184. S. 
borealis, var. 8, Hook. 1. c. i. 95.— Labrador, Martin, Allen, @ 
Illinois, Vasey, Hill; Montana, Canby, and northward. 
S. fontinalis. Glabrous, stems regularly and dichotomously 
branched, 6-12 inches long: branches spreading: leaves spatulate- 
linear, obtusish, spreading, 5-10 lines long: internodes elongated, 1-2 
inches in length: peduncles solitary in the forks of the branches, 1-1} 
inches long, ascending: sepals 4-5, oblong, obtuse, 3-nerved: pe 
part; Wats. & Coulter in Gray, Man. ed. 6, 87 in part. . 
fontinalis, Short & Peter, Transylv. Journ. Med. 28, 600; Torr. 
Gray, Fl. i. 177. Spergula fontinalis, Dietr. Syn. Pi. ii. 
Cliffs of Kentucky River and Elkhorn Creek, Kentucky, se 
Peter; Nashville, Tenn., Gattinger; April, May. This too sis 
known plant, of distinctly aquatic habit, merits further study as 2 
more abundant material. It is certainly distinct from S. crassifo" 
Ehbrh. 
S. humifusa, Rorrs. Low, densely matted, smooth: a: 
prostrate or ascending, angulate, shining: leaves elliptioo ty ; 
oblong, acutish, 2-5 lines long, marcescent : peduncles axillary: *” 
lines in length: sepals ovate-oblong, acute, narrowly margined : 
stems . 
