312 81. HYDROCHARIDACE^. 



Style 1. Stigmas 3, reflexed. Fr. baccate, or dry and flat. 

 Embryo minute, quite inclosed in the albumen. 



1. Tamus. Perianth bellsbaped ; limb 5-parted. Male with 

 6 stamens. Fem. with the perigone adhering to the ovary 

 and persistent. Stam. veiy short, abortive. 



1. Tamvs Linn. Black Bryony. 



1. T. communis (L.); 1. undivided cordate acute. — E. B. 91. 

 — Dioecious. Koot large, thick, fleshy. St. very long, twining. 

 Racemes axillary, on long stalks. Fl. yellowish-green, regular, 

 small. Berry red. — Hedges and thickets. P. V. VI. E. 



Subdivision II. FLORIDiE. 



Leaves parallel-veined, persistent. Floral envelopes 

 whorled. 



Order LXXXI. HYDKOCHARIDACE^. 



Sep. 3, herbaceous. Pet. 3, regular, coloured. Stam. epigy- 

 nous. Ovary solitary, inferior ; placentas parietal, sometimes 

 projecting into the centre of the ovary. Stigmas 3 — 6. Fr. dry, 

 or succulent, not bursting, 1- or spuriously many-celled. Seeds 

 many. Albumen 0. Embryo straight, cylindrical. 



1. Hydbocharis. Bioecious. Cal. 3-parted. Pet. 3. Male 

 with 9 — 12 stamens in 3 rows surrounding 3 abortive styles. 

 Fem. with 3 abortive filaments and 3 fleshy scales surround- 

 ing the 6 deeply bifid styles. Caps. 6-celied, many-seeded. 



2. Stratiotes. Dioecious. Cal. 3-parted. Pet. 3. Male 

 with 12 or more stamens surrounded by many abortive ones. 

 Fem. with 6 deeply bifid styles Berry fi-celled, many- 

 seeded. 



3. Anachabis. Dioecious. Cal. 3-parted. Pet. 3. "Male. 

 Sep. ovate-oblong. Pet.linear or none. Stam. 9 ; filaments 

 combined into a column below." Fem. with a long filiform 

 tube, 3 abortive filaments and ligulate stigmas. Caps. 1- 

 celled, few-seeded. 



1. Hydrocharis iwm. Frog-bit. 



1. H. Morsus-raniE {L.).—E.B. 808. St 44. 16. R.vii.62.— 

 Floating. Creeping. L. stalked, roundish-reniform, entire. Fl. 

 white, delicate, springing from a pellucid membranous sheath. 

 Seeds covered with beautiful prominent spirally twisted cells. — 

 Ponds and ditches. P. VII. VIII. E. I. 



