ORDER 21. CARYOPHYLLACKjE. 259 



about equal to the veinless sepals. CD Wet places, K H., N. Y., N. to Arctic 

 Am. A spreading, flaccid plant. St. 6 to 12 or 15' long, with diffuse cymes 

 both terminal and axillary. Lvs. 8 to 15" long, 1-veiued. Petals, when present, 

 white, small, at length about as long as the lanceolate, acute sepals. Caps, longer 

 than the calyx. Jn. 3 JL 



6 S. aquatica Pollich. Nearly glabrous; st. slender, decumbent; Ivs. lance- 

 oval and oblong, acute, with manifest veinlets ; cymes lateral ; sep. lanceolate, 

 very acute, 3-veined, rather longer than the bifid petals; caps, ovoid, about 

 equalling the calyx; sty. 3. '4- Swampy springs, Penn., Md. (Dr. Robbins); 

 also, Rocky Mts. A very slender plant, 6 to 12' long, with inconspicuous flowers 

 Lvs. 6" by 2 to 3". May. (Labraea uliginosa Hook.) 



7 S. longipes Goldie. Smooth and shining ; st. more or less decumbent, with 

 ascending branches; Ivs. linear-lanceolate, broadest at base, acute; peduncles and 

 pedicels erect, filiform, cymous, with ovate membranous bracts at base ; sep. with 

 membranous margins, obscurely 3-veined, scarcely shorter than the petals. Q 

 Lake shores, N. Y. and Mich. Petals white, 2-parted. Fls. in loose cymes, the 

 terminal peduncle or the middle one the longest Jn. Aug 



8 S. longifolia Muhl. Lvs. linear ; cyme terminal, spreading, with lanceolate, 

 scarious bracts; pedicels spreading; cal. 3-veined about equal to the petals. U. 

 S. N. to Arc. Circle. The stems are of considerable length, very slender and 

 brittle, supported on other plants and bushes. Lvs. alternate at base. Fls. in a 

 divaricate, naked cyme, very elegant, white, appearing in 10 segments like the 

 other species. Three sharp, green veins singularly distinguish the sepals. Jn., Jl. 



8. ARENARIA, L. SANDWORT. (Lat. arena, sand ; in which most 

 species grow.) Sepals 5, spreading; petals 5, entire; stamens 10, 

 rarely fewer ; styles 3 ; ovary 1-celled ; capsule 3-valved, valves each 

 2-parted ; seeds oo. Sty. rarely 2 or 4. 



ARENAKIA. Leaves and sepals acute. Seeds not appendaged ....................... Nos. 1, 2 



MUJRINGIA. Leaves and sepals obtuse. Seeds strophiolate ........................... No. 3 



1 A. serpyllifolia L. THYME-LEAVED SANDWORT. St. dichotomous, spreading ; 

 Ivs. ovate, acute, subciliate; cal. acute, striate; petals shorter than the calyx; 

 caps, ovate, 6-toothed. () By roadsides and in sandy fields, Ms. to Ga. Sts. 

 numerous, downy, with reflexed hairs, a few inches in length. Lvs. but little 

 longer than a flaxseed, beautifully ciliate. Fls. on axillary and terminal 

 peduncles. Pet. white, oval, mostly much shorter than the 3 to 5-veined, accu- 

 minate, hairy sepals. Jn. 



2 A. diffusa Ell. St. long, decumbent, diffuse; Ivs. oblong or ovate-lanceolate, 

 acute at both ends; ped. 1 -flowered; sep. acute: pet. oval, entire, much shorter 

 than the calyx, but generally wanting. Moist woods, N. Car. to Fla. and Ga. 

 Sts. clambering, 2 to 5f in length, pubescent. Lvs. minutely dotted, attenuate 

 at base often to a petiole, 6 to 12" long. Ped. twice as long, terminal, but soon 

 axillary. Cal. as long (1") as in No. 1. Apr. Jn. (Stellaria lamiginosa Torr. 

 & Gr.) 



3 A. lateriflora L. Upright, slightly pubescent; Ivs. oval, obtuse; ped. lateral, 

 2 to 3-flowered ; sds. (strophiolate) appendaged at the hilum. 1{- Damp, shady 

 grounds, N". States and Brit. Am. St. 6 to 10' high, nearly simple, slender. Lvs. 

 elliptical, rounded at each end, 6 to 10" long, as wide, on very slender petioles. 

 Ped. terminal and lateral, 2 to 3' long, dividing into 2 or more filiform pedicels, 

 one of them with 2 bracteoles in the middle. Fls. 4" diam. ; white petals more 

 than twice as long as the sepals. Jn. (Moeringia, L.) 



9. ALSINE, "Wahl. GROVE SANDWORT. (Gr. a/uro^, a grove ; the 

 favorite locality of these little plants.) Sepals 5 ; petals o, entire or 

 merely notched at apex ; stamens 10 ; styles 3 ; ovary 1-celled; cap- 

 sule deeply 3-valved, valves entire; seeds oo. Small, slender herbs, 



