290 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Stellaria, or often more densely tufted and occasionally distinctly 

 woody at the base. Leaves sessile or nearly so, either flat and with 

 a well developed blade or more frequently awl-shaped or acerose. 

 Flowers of Stellaria, but with petals entire or barely retuse (sometimes 

 more deeply cleft in A. patula, Michx.). — Gen. no. 374 in part ; Torr. 

 & Gray, Fl. i. 178; Reichb. Icon. Fl. Germ. v. t. 216-219; Benth. 

 & Hook. Gen. i. 150; Wats. Bibl. Index, 94; Hook. & Jackson, 

 Index Kew. i. 178. 



§ 1. MaiHRiNGiA, L., as amended by Fenzl. Seeds, at least when 

 young, provided at the hilum with a light-colored spongy appendage 

 (strophiole). Habit of Stellaria. — Fenzl in Endl. Gen. 968; DC. 

 Prodr. i. 390; Gray, Gen. ii. t. 112. 



A. lateriflora, L. Stems terete, weak, often decumbent, puberu- 

 lent : leaves elliptic-oblong or oval, obtuse or rounded at the apex, 

 thin, puberulent, 5-10 lines long ; the veins and edges beneath 

 covered with a fine spreading pubescence : cymes pedunculate and 

 somewhat umbellately few-(l-6-)flowered : sepals ovate, obtuse or 

 scarcely acute, 1^ lines long, but one third to one half the length 

 of the obovate petals: filaments pubescent. — Spec. 423; Hook. Fl. 

 Bor.-Am. i. 102, t. 36; Torr. & Gray, Fl. i. 182, 675. A. Pennsyl- 

 vanica, Muhl. Ind. Fl. Lane. 169. A. buxifolia, Poir. in Lam. Encycl. 

 vi. 362; Torr. & Gray, Fl. i. 182. A. Haenheana, Bartl. in Presl, 

 Rel. Haenk. ii. 15. Stellaria bijlora, Pursh, Fl. 317. Mcehringia 

 lateriflora, Fenzl, Verbr. Alsiu. 18, 38, & Ledeb. Fl. Ross. i. 371; 

 Gray, Gen. ii. 36, t. 112. — New England to New Jersey, Colorado, 

 Oregon, and northward to the Arctic Ocean. 



A. macrophylla, Hook. Stems decumbent, angled, pulverulent- 

 pubescent : leaves lanceolate, acutish to acuminate at both ends, (less 

 commonly elliptic, obtusish,) 1-3 inches in length, glabrous, more or 

 less punctate: peduncles slender, terminal or becoming axillary, 1-5- 

 flowered : sepals ovate-lanceolate, very acuminate, exceeding the 

 petals. — Fl. Bor.-Am. i. 102, t. 37; Torr. & Gray, Fl. i. 182 ; Torr. 

 Pacif. R. Rep. iv. 69 ; Gray, Proc. Am. Acad. viii. 378 ; Greene, 

 Fl. Francis. 125. Mcehringia macrophylla, Torr. Bot. Wilkes Exp. 

 246. — Extending from San Diego (Orcutt) northward through Cali- 

 fornia, Oregon, and Washington into British America, and eastward 

 to Isle St. Ignace, Lake Superior, Wheeler; April to August. While 

 the essential floral characters remain the same, there is considerable 

 variation in the size, texture, and shape of the leaves. 



§ 2. Ammadenia. Styles 3-5 : disk conspicuous, 10-lobed and 

 glanduliferous : capsule globose, somewhat baccate ; seeds not strophio- 



