ORDER 18. ELATINACE^E. 51 



1. DROSERA, L. SUNDKW. (ApotioS, dew; from tlie dew-like se- 

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

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

 many-seeded. @ or H Small marsh herbs. Lvs. covered with reddish, 

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

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



* Scapes 4 6 times as long as the spreading leaves Nos. 1-3 



* Scapes 12 times as long as the ascending leaves Nos. 4-6 



1 D. rotundifolia L. Lvs. orbicular, abruptly contracted into the hairy petiole ; fls. 



white. @ A curious little plant, in bogs and muddy shores. Scapes 6 9', G-9-flow- 

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



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



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



3 I>. brevifolia Ph. Lvs. cuneiform-spatulate, forming a small, dense tuft, (I' diam.) ; 



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



4 I>. longifolia L. Lvs. spatulate-oblong or obovate, ascending, alternate, tapering 



at base int&a long, smooth petiole ; scape declined at ba?e ; pet. wh. TI 4-1'. Lvs.2-3'. 



5 .D. linearis 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, if Borders of lakes, North. White. 



6 D. fililormis 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. y. Wet sand. If. Purple. 



2, DION.33A, L. VENUS' FLY-TRAP. (One of the names of Venus.) 

 Stam. 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. muscipula Ell. A very curious plant. Sandy bogs in Car. Lvs. rosulate, lamina 

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

 and other objects which light upon it. Scape 6 12', with an umbel of 8 10 whita 

 flowers. April, May. t 



ORDER XVIII. ELATINACE^E. WATER PEPPERS. 



Herls small, annual, with opposite leaves and membranous stipules. 

 Flowers minute, axillary. Sepals 3 5, distinct or slightly coherent at base, 

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

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

 tate ; 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, ffff Veiy small 

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



1 12. Americana Am. Stems creeping, diffuse, in patches ; branches ascending 1 2' ; 



leaves wedge-obovate, 2", obtuse ; flowers 2-parted, rarely 3-parted ; seeds 68. 



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



Ivs. spatulate, ' \ fls. 2-parted ; seeds slightly curved. Sand Lake, N. Y. (C. H. Peck). 



