260 Order 21.— OARTOPHYLLACEuE. 



with very narrow, minute Ivs. and whits fls. (The species were for- 

 merly included in the last genus.) 



§ Sepals S to 5-Teined, ncnle Nos, 1— S 



§ Sepals veinless, obtuse. — Leftves densely imbricated No. 4 



— ^Leaves opposite, distant Nos. 5—7 



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

 Iva. linear-Qliform, obtuse ; petais emarginaU. — ® Eocky cliffs, Ya. 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 diffuse and mfiny-flowered. 

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



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

 flat ; pet. entire, twice as long as the 5-Teined sepals. — ® 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 G' high. Lvs. rather erect, 3 to 

 6" by J". Pedicels minutely glandular. Petals about 3" long. (Arenaria, 

 Nutt.) 



3 A. strfcta. Glabrous, diffuse ; st. branched from the base ; lvs. subulate-lin- 

 ear, rigid, so fascicled in the axils as to appear whorled; cymes fevr-fiowered, 

 with spreading branches. — 1(. Sterile grounds. Are. Am. to Car. Sts. 8 to W 

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

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

 lanceolate sepals. May, Jn. (Arenaria, Mx. Alsine Miohauxii Fenzl.) 



4 A. aquarrosa Fenzl. Caespitous; st. few-flowered; lower lvs. equarrous-im- 

 brlcate, crowded, upper ones few, all subulate, channeled, smooth ; pet. obovato, ■ 

 3 times longer than the obtuse, vemless sepals. — 1\. In sandy barrens. Long 

 Island to 6a. Sts. 6 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. G-reenldndioa Fenzl. Ccespitous ; sts. numerous, filiform ; ivs. linear, fiat, 

 spreading; ped. 1-flowered, elongated, divaricate. — H Summits of high moun- 

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

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

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

 veinless. Aug. (Arenaria, Sprong.) ' , 



6 A. brevifdlia. Erect {not tai\sS), few-leaved ; sts. many, filiform, simple, cym- 

 ous above; lvs. minute, 10 times shorter than the intemodes, ovate, subulate ; 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 large 

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

 Nutt.) 



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

 spreading; sep. oval, veinless, half as long as the petals. — 2(. Mia. Car. toGa. and 

 Ala. Sts. very numerous, 5 to 8" high, forming grass-hko tufts, the 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. 6, in its tufted 

 stems. (Arenaria Mx, ueo Ell.) 



10. SAGINA, L. Pearlwokt. (La.t. saffina, food or nourishment; 

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

 i), 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. procftmbens L. Procumbent, glabrous ; pet. about half as long as the roundish- 

 obtuse sepals ; sta. sep. and pet. 4 or 5. — H 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, connate or opposite.. Fls. white and green, 

 axillary, on peduncles longer than the leaves. Jn. 



