454 DECANDRIA. TRIGYN!A. arenabia, 



Leaves an inch long, decussate, fleshy, shining, spreading; 

 margin with a minute eroded cartilaginous border. Flowers 

 subsolitary, axillary, on very short fiedicels. Leaflets of the 

 calyx ovate, obtuse, concave, scarious on the margin. Petals 

 oborate-spathulate, entire, or slightly emarginate, about as long 

 as the calyx. Stamens 10 — ll,wit]i a small gland between 

 each 2 at the base ; filaments shorter than the petals; anthers 

 oblong. Styles 5, (3 in the lower flowers,) short. Cafisule 

 subglobose, 3 — 5-angIed, 1 -celled, many-seeded. Seeds nu- 

 merous, black. 

 Hab. On the sea-coast of Long-Island. Long-Branch, New- 

 Jersey. Coofier. Newburyport, Massachusetts. Gushing. 



2. A. lateriflora L, : stem filiform, simple, or branched, 

 pubescent ; leaves ovate, subtriply-nerved ; peduncle lateral, 

 solitary, elongated, bifid ; one of the pedicels vi^ith 2 oppo- 

 site bracts near the middle; corolla longer than the calyxo 

 Willd, Spec. II. p. 718. Gmel. FL Sib. IV. p. 718: 

 Pursk Fl. hip. 317, Big. Bost.ip, 109. Goodie in, 

 Edin. Phil. Jour. VI. p. 327. 



Root perennial. Stem 5 — 8 inches high, often simple, but fre- 

 quently branched. Leaves sessile, three-fourths of an inch 

 long, pale green, punctate; margin and midrib ciliate-pubes- 

 cent. Peduncle filiform, axillary near the summit of the stem, 

 bifurcate, bracteate at the division. Leaflets of the calyx ovate- 

 oblong, obtuse, smooth. Petals white, oblong, twice as long 

 as the calyx, obtuse. Stamens 10; filament^s pubescent. Ca/r= 

 sule ovate. 



Hab. In bog meadows. Not uncommon in the vicinity of New- 

 York. Cambridge, N. Y. Stevenson. Near Boston, 

 Bigelow. Plainfield, Massachusetts. Porter. Common 

 in the mountains of Pennsylvania. Mutt all. June. 



3. A. serpyllifolia L. : stem dicholomous, diffuse ; leaves 

 ovate, acute, subciliatc ; calyx hairy ; exterior leaflets 5-nbbed. 

 Willd. Spec. II. p. 720. Smith Fl. Brit, II. p. 479. 

 Eng, Bot. t. 923. M i c h. Fl. I. p. 274. Pursh Fl. I, 

 p. 316. Elliott Sk. L p. 518. 



Boot annual. Stem mostly procumbent, 3—8 inches long, mnch 

 branched, minutely and retrorsely pubescent. Leaves scarcely 

 one-fourth of an inch long, closely sessile, scabrous, nerved, 

 subacuminate. Flowers solitary, axillary and terminal, on 

 pedicels about half an inch long. Leaflets of the calyx lan- 

 ceolate, acuminate ; the exterior broader, and 3— 5-nerved. 

 Petals oval, about as long as the calyx. Stamejis rather 

 shorter than the petals. Cafisule ovate, 6-toothed at the summit. 



Hab. In sandy fields and cultivated grounds. May—July. 



4. A. squarrosa Mich.: cespitose; inferior leaver 

 squarrose-imbricate, canaliculate, pungent; stem simple, few- 



