312 81. HYDROCHARIDACEJE. 



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

 Embryo minute, quite inclosed in the albumen. 



1. TAMUS. Perianth bellshaped ; limb 5-parted. Male with 

 6 stamens. Fern, with the perigone adhering to the ovary 

 and persistent. Stam. very short, abortive. 



1 . TAMUS Linn. Black Bryony, 



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

 Dioecious. Hoot 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. FLORIDA. 



Leaves parallel-veined, persistent. Floral envelopes 

 whorled. 



Order LXXXI. HYDROCHAIUDACE.E. 



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. HYDROCHARIS. Dioecious. Cal. 3-parted. Pet. 3. Male 

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

 Fern, with 3 abortive filaments and 3 fleshy scales surround- 

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



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

 with 12 or more stamens surrounded by many abortive ones. 

 Fern, with 6 deeply bifid styles Berry 6-celled, many- 

 seeded. 



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

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

 combined into a column below." Fern, with a long filiform 

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

 celled, few-seeded. 



1. HYDROCHARTS Linn. Frog-bit. 



1. H. Morsus-rantB (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. 



