ORDER 18 ELATINACE/E. 51 



1. DROSERA, L. SUNDEW. (dpo6o<, dew ; from the clew-like se- 

 cretion.) Sep. 5, united at base, persistent. Pet. 5. Stain. 5. Sty. 3 5. 

 eacli 2-parted, the halves entire or many-cleft. Caps. 3-5-valved, 1-celled, 

 many-seeded. (2) or U Small marsh herbs. Lvs. covered with reddish, 

 glandular hairs, secreting a viscid fluid. Flowers in a raceme on r* slender 

 scape which is at first coiled, uncoiling as the flowers open. 



* Scapes 4 (i times as long as the spreading leaves Nos. 1-3 



* Scapes 12 times as long as the ascending leaves Nos. 4-0 



1 D. rot u ml i folia L. Lvs. orbicular, abruptly contracted into the hairy petiole ; fls. 



white. (2) A curious little plant, in bogs and muddy shores. Scapes G ()', (>-9-flow- 

 ered. Leaves 1 2', glistening as with dew-drops. June Aug. 



2 D. capillarfs Poir. Lvs. obovate, cuneiform at base, the petioles naked ; flowers 



purple ; scape erect. (2) Marshes, S. Car. to Fla. Scapes 312', 6-12-flowered. May. 



3 D. brevlfolia Ph. Lvs. cuneiform-spatnlate. forming a small, dense tuft (!' diam.) ; 



petioles very short, hairy ; flowers few, rose-colored. @ N. Car. to Fla. 2 5'. 



4 I>. longlfolfa L. Lvs. spatnlate-oblong or obovate, ascending, alternate, tapering 



at base into a long, smooth petiole ; scape declined at base : pet. wh. n 4-7'. Lvs.2-3'. 



5 -D. Hnearls Goldie. Lvs. linear, obtuse ; petioles elongated, naked, erect ; scapes 



few-flowered, about the length of the leaves (30 ; calyx glabrous, much shorter than 

 the oval capsule ; seeds oval, smooth, y Borders of lakes, North. White. 



6 D. ft II form i Raf. Lvs. filiform, very long, erect; scape nearly simple, longer than 



the leaves, many-flowered : petals obovate. erosely denticulate, longer than the glan- 

 dular calyx ; style 2-parted to the base. v. Wet sand. If. Purple. 



2. DIONJEA, L. VENUS' FLY-TRAP. (One of the names of Venus.) 

 Stain. 10 15. Sty. united into 1, the stigmas many-cleft. Caps, breaking 

 irregularly in opening, 1-celled. Seeds many, in the bottom of the cell. 

 U Glabrous herbs. Lvs. all radical, sensitive, closing convulsively when 

 touched. Scape umbelled. 



D. miiscipula Ell. A very curious plant. Sandy bogs in Car. Lvs. rosulate, lamina 

 roundish, spinulose on the margins and upper surface, instantly closing upon insects 

 and other objects which light upon it. Scape 612', with an umbel of 8 10 white 

 flowers. April, May. t 



ORDER XVIII. ELATINACE^S. WATER PEPPERS. 



Kerbs small, annual, with opposite leaves and membranous stipules 

 Flowers minute, axillary. Sepals 2 5, distinct or slightly coherent at base, 

 persistent. Petals hypogynous, as many as the sepals. Stamens twice as 

 many as the petals, anthers introrse. Ovaries 2-6-celled. Stigmas 2 6, capi- 

 Uite ; placenta in the axis. Fruit capsular. Seeds numerous, exalbuminous. 



ELATINE, L. MUD PURSLANE. Fls. 2-, 3-, or 4-parted, symmetrical, 

 all the parts distinct except the united ovaries. Stig. sessile. ? Veiy small 

 plants growing in mud, with minute, axillary, sessile flowers. 



1 E. Americana Arn. Stems creeping, diffuse, in patches ; branches ascending 12' ; 



leaves wedge-obovate, 2", obtuse ; flowers 2-parted, rarely 3-parted ; seeds 6 8. 



2 E Clliitoniaiia (Peck). Stems erect, 4", in very dense tufts, from matted roots; 



Ivs. epatulate, |" ; fls. 2-parted ; seeds slightly curved. Sand Lake, N. Y. (C. II. Peck). 



