260 Ordeq 21.— CARYOPHYLLACEJE. 



with very narrow, minute lvs. and whito lis. (The species were for- 

 merly included in the last genus.) 



S Sepals " to 5- veined, ncnto Nos. 1—8 



( Sepals veinless, obtuse. — Leaves densely imbricated ..No. 4 



— Leaves opposite, distant Nos. 5 — T 



1 A. patula Gray. Diffusely and divaricately branched, glandular-pubescent; 

 lvs. linear-filiform, obtuse; petals emarginate. — Q) Rocky cliffs, Va. and Ky. Sts. 

 exceedingly slender, 6 — 10' high, many from one root. Lvs. few and minute, 3 

 to 5" long, obtuse under a lens. Cyme at length diffuso and many-flowered.- 

 Petals twice as long (2') as the 3 to 5-veined sepals. Jn., Jl. (Arcnaria Mx.) 



2 A. Pitcheri. Erect, fastigiately branched, almost glabrous ; lvs. linear, obtuse, 

 flat ; pet. entire, twice as long as the 5-veined sepals. — (J) Davison Co., Tenn. 

 (Prof. Calender), and westward. Sts. several from one root, simple, with a few- 

 flowered (3 to 7), pedunculate cyme at top, 3 to 6' high. Lvs. rather erect, 3 to 

 6'' by i". Pedicels minutely glandular. Petals about 3" long. (Arcnaria, 

 Nutt.) 



3 A. stricta. Glabrous, diffuse ; st. branched from the baso ; lvs. subulate-lin- 

 ear, rigid, so fascicled in tho axils as to appear whorled; cymes few-flowered, 

 with spreading branches. — 21 Sterile grounds, Arc. Am. to Car. Sts. 8 to 10* 

 high. Lvs. 5 to 8" long, very narrow and acute, rigid, sessile, 1-veined, much 

 fascicled in tho axils. Pet. obovate-oblong, twice as long as the 3-veined, ovate- 

 lanceolate sepals. May, Jn. (Arenaria, Mx. Alsino Michauxii Fenzl.) 



4 A. squarrosa Fenzl. Crespitous: st. few-flowered; lower lvs. squarrous-im- 

 bricate, crowded, upper ones few, all subulate, channeled, smooth ; pet. obovate, 

 3 times longer than tho obtuse, veinless sepals. — % In sandy barrens, Long 

 Island to Ga. Sts. G to 10' high, pubescent, much divided at base into simple 

 branches. Lvs. about J' long, obtuse, sessile. Fls. white, in small, terminal 

 cymes. Sep. green. Caps, obtuse. Apr., — Sept. (Arenaria Mx). 



5 A. Greenlandica Fenzl. Cozspitous ; sts. numerous, filiform ; lvs. linear, fiat, 

 spreading; pod. 1-flowered, elongated, divaricate. — % Summits of high moun- 

 tains, N. H., N. Y. to Greenland. It grows in tufted masses consisting of exceed- 

 ingly numerous stems about 3' high, and sprinkled over with largo (8'' diam.) 

 white fls. with yellow stamens. Lvs. 4 to C" by £", numerous. Sepals ovate, 

 veinless. Aug. (Arenaria, Spreng.) 



6 A. brevifolia. Erect (not tufted), few-leaved; sts. many, filiform, simple, cym- 

 ous above; lvs. minute, 10 times shorter tlian the internodes, ovate, subidale ; sep. 

 oblong.— Rocks (Stone Mt., &c), Ga. Sts. almost capillary, 2—3' high, with 

 about 3 pairs of leaves and 3 to 7 flowers on long pedicels. Fls. not half as largo 

 as in tho preceding (about 4" diam.) Lvs. 1" long. Apr., May. (Arenaria 

 Nutt.) 



7 A. glabra. Csespitous, glabrous ; sts. decumbent, filiform ; lvs. linear-setaceous, 

 spreading; sep. oval, veinless, half as long as the petals. — 21 Mts. Car. to Ga. and 

 Ala. Sts. very numerous, 5 to 8" high, forming grass-like tufts, tho branches 

 exceedingly slender, divaricate. Lvs. 5 or 6" long. It differs from No. 5, in its 

 bristle-shaped leaves and smaller (5" broad) fls., and from No. G, in its tufted 

 stems. (Arenaria Mx., nee Ell.) 



iO. SAGINA, L. Pearl-wort. (Lat sagina, food or nourishment ; 

 badly applied to these minute plants.) Sepals, styles and petals 4 or 

 5, the latter entire, often ; stamens as many or twice as many as the 

 sepals; capsule 4 or 5-valved, many-seeded. — Diminutive, spreading 

 herbs, with narrow leaves and small, white flowers. 



1 S. prociimbens L. Procumbent, glabrous ; pet. about half as long as the roundish' 

 obtuse sepals; sta. sep. and pot. 4 or 5. — 1± A small weed, with slender, creeping 

 stems, 3 or 4' long, found in damp places, R. Isl., N. Y. to S. Car. Lvs. very 

 small, linear, mucronate-pointed, connato or opposite. Fls. whito and green, 

 axillary, on peduncles longer than the leaves. Jn. 



