260 ORDER 21. CARYOPHYLLACE^E. 



with very narrow, minute Ivs. and whit3 fls. (The species were for- 

 merly included in the last genus.) 



Sepals 3 to 5- veined, acute Nos. 13 



Sepals veinless, obtuse. Leaves densely imbricated No. 4 



Leaves opposite, distant Nos. 5 7 



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

 Ivs. linear-filiform, obtuse ; petals emarginate. (I) 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 diffuse and many-flowered. 

 Petals twice as long (2'') as the 3 to 5-veined sepals. Jn., JL (Arenaria MX.) 



2 A. Pftcheri. Erect, fastigiately "branched, almost glabrous ; Ivs. linear, obtuse, 

 Hat ; pet. entire, twice as long as the 6-veined sepals. (1) Davison Co., Tenn. 

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



' flowered (3 to7), pedunculate cymo at top, 3 to 6' high. Lvs. rather erect, 3 to 

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

 Xutt.) 



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

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

 with spreading branches. If 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. Alsino Michauxii Fenzl.) 



4 A. squarrosa Fenzl. Csespitous; st. few-flowered; lower Ivs. squarrous-im- 

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

 3 tunes longer than the obtuse, veinless sepals. 7J. In sandy barrens, Long 

 Island to Ga. Sts. 6 to 10' high, pubescent, much divided at base into simple 

 branches. Lvs. about A/ long, obtuse, sessile. Fls. white, in small, terminal 

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



5 A. Greenldiidica Fenzl. Ccespitous ; sts. numerous, filiform ; Ivs. linear, flat, 

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

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

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

 white fls. with yellow stamens. Lvs. 4 to 6" by ", numerous. Sepals ovate, 

 veinless. Aug. (Arenaria, Spreng.) 



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

 ous above; Ivs. minute, 10 times shorter than the internodes, 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 largo 

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

 Nutt.) 



7 A. glabra. Ceespitous, glabrous ; sts. decumbent, filiform ; Ivs. linear-setaceous, 

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

 Ala. Sts. very numerous, 5 to 8" high, forming grass-like 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., nee Ell.) 



10. SAGINA, L. PEARLWORT. (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. procumbens L. Procumbent, glabrous ; pet. about half as long as the roundish- 

 obtuse sepals ; sta. sep. and pet. 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, connate or opposite. Fls. white and green, 

 axillary, on peduncles longer than the leaves. Jn. 



