260 Oeder 21.— CARTOPHTLLAOE^. 



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

 merly included in the last genus.) 



S Sepals 8 to 5-voino(l, aonlo Nos.l— S 



§ Sepals veinless, obtuse. — Leaves densely imbricated * •■ •^^' ^ 



— Leaves opposite, distant Nos. 5 — 7 



1 A. pdtula Gray. Dilfusely and divaricately branched, glandukr-pubesoent ; 

 Ivs. linear-filiform, obtuse ; petals enuwginate.—^ Eocky 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 diffuse and many-flowered. 

 Petals twice as long (2'') as the 3 to 5-Teined sepals. Jn., JL (Areriaria Mx.) 



2 A. Pftoheri. Erect, fastigiateVy Irandied, almost glabrous ; Ivs. linear, obtuse, 

 flat ; pet. entire, twice as long as the 5-veined sepals. — (D 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 J". Pedicels minutely glandular. Petals about 3" long. (Arenaria, 

 ISTutt.) 



3 A. stricta. Glabrous, diffuse ; st. branched from the base ; tos. subulate-lin- 

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

 with spreading branches. — 1^ 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 the axils. Pet. obovate-oblong, twice as long as the 3-veined, ovate- 

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



4 A. squarrosa FenzL Csespitous; st. few-flowered; lower lvs. squarrous-im- 

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

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

 Island to Ga. 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. Gaespitous ; sts. numerous, filiform ; lvs. linear, flat, 

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

 tains, N. H., K. T. to Greenland. It grows in tufl^ed 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 6" by J", numerous. Sepals ovate, 

 veinles,?. Aug. (Arenaria, Spreng.) 



6 A. brevifdlia. Erect (not bs&eS), few-leaved; sts. many, filiform, simple, cym- 

 ous above; lvs. Tmmute, 10 times shorter than the interrwdes, ovate, subulate; sep. 

 oblong. — Eooka (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. Csespitous, glabrous ; sta. decumbent, filiform ; lvs. linear-setaceous, 

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

 Ala. Sts. very numerous, 5 to 8" high, forming grass-hke tufls, 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 tuflied 

 stems. (Arenaria Mx, ueo EU.) 



iO. SAGINA, L. Pearlwort. {La.%. sagina, food or nourishment ; 

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

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

 sepals; capsule 4 or 6-valved, many-seeded. — Diminutive, spreading 

 herbs, with narrow leaves and small, white flowers. 



1 S. procilmbens L. Procumbent, glabrous ; pet. ohout half as long as ilw roundish- 

 obtuse sepals; sta. sep. and pet, 4 or 6. — If A small weed, with slender, creeping 

 stems, 3 or 4' long, found ip damp places, R. IsL, N. T. to S. Car. Lvs. very 

 small, linear, mucronate-pointed, connate or opposite. Fls. white and green, 

 axillary, on peduncles longer than the leaves, Jn, 



