13. ELAIINACE^. — 14. CAETOPHrLLACEA 47 



B. 189. — ^. P. uUginosa (R.) ; caps, rather wedgesliaped telow, 

 fl. larger.— «. Wye Downs, Kent. Mr. J. F. Duthie. ^. Cronk- 

 ley Fell, Yorkshire. Mr. James Backhouse. P. VI. VII. E. 



Order XIII. ELATINACEiE. 



Sep. 3 — 5, distinct, or slightly connate. Pet. 3 — 5. Stam. 

 as many or twice as many as the pet., free. Caps. 3 — 5-celled, 

 3 — 5-vaIved, loculicidal, dissepiments adhering to central axis. 

 Styles 3 — 5 ; stigmas capitate. Seeds many, albumen 0, embryo 

 curved with the seed. — h. opposite. Stip. minute or inconspi- 

 cuous. 



1. Elatinb. Oal. 3— 4-parted. Pet. 3—4. Stam. 3 — 4 or 

 6 — 8. Styles 3 — 4. Caps. 3 — 4-celled, many-seeded. Seeds 

 cylindrical, straight or bent. 



1. Ela'tdste Linn. Waterwort. 



1. E.hexan'dra(T>C); 1. opposite longer than their petioles, 

 fl. slightly stalked with 6 stam. and 3 obovate pet., caps, turbi- 

 nate concave at the summit 3- celled, seeds nearly straight as- 

 cending 8—12 in each cell.— ^. B. 965. R. 1. f. 599. E. Hy- 

 dropiper and J2. tripetala (Sm.). — ^Plant minute, creeping. Fl. 

 alternate, axillary. Cal. 3-fid. — Forming small matted tufta 

 under water, rare. A. VIII. E. S. I. 



2. L. Hydropiper (L.) ; 1. opposite shorter than their petioles, 

 fl. sessile with 8 stam. and 4 ovate pet., caps, roundish depressed. 

 4-celled, seeds bent almost double pendulous 4 in each cell. — 

 E. B. 8. 2670. E. siphosperma Dmjk. — Plant minute, creeping. 

 Cal. 4-fid. — Very rare, growing under water. A. VIII. E. I. 



Order XIV. CAEYOPHTLLACEJE. 



Sep. 6 or 4, distinct or connected into a tube. Pet. 5 or 4, 

 clawed (rarely 0). Stam. usually twice as many, sometimes as 

 many as the petals, free or connected at the base. Anth. opening 

 longitudinally. Ovary one, often stalked. Stigmas 2^5, seesUe, 

 filiform. Caps. 1- or imperfectly 2 — 5-ceIled, opening by twice 

 as many teeth as stigmas, sometimes valvular. Placenta cen- 

 tral. Embryo generally curved round mealy albumen. — L. 

 opposite, without or rarely with scarious stipules. 



Suborder I. SILENEiE. 

 Sep. connate, forming a tube. Stam. 10. Filaments con- 



