80. DIOSCOREACEiE. 81. HYDROCHARIDACE^. 813 
Style 1. Stigmas 3, reflexed. Fr. baccate, or dry and flat. 
Embryo mimite, quite inclosed in the albumen. 
1. Tamus. Perianth bellshaped ; limb .5-parted. Male with 
6 stamens. Fern, vrith the perianth adhering to the ovaiy 
and persistent. Stam. very short, abortive. 
1. Tx'wjs Linn. Black Bryony. 
• 1. T. communis (L.) ; 1. undinded cordate acute. — E. B. 91. 
— Dioecious. Root large, thick, fleshy. St. very long, twining. 
Racemes axillary, on long stalks. Fl. yellovnsh green, regular, 
small. Berry red. — ^He^es and thickets. P. V, E. 
Division II. FLORIDiE. 
Leaves parallel-veined, persistent. Floral envelopes w^horled, 
or none. — Ord. LXXXI. — XCV. 
Order LXXXI. HYDEOCHAEIDACE^. 
Sep. 3, herbaceous. Pet. 3, regular, coloured. Stam. epigy- 
nous. Ovary solitary, inferior; placentas pai-ietal, sometimes 
projecting into the centre of the ovary. Stigmas 3—6. Fr. dry, 
or succulent, not huisting, 1- or spuriously many-celled. Seeds 
many. Albumen 0. Embryo straight, cylindrical. 
1. Hydrochaeis. Dioecious. 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 sur- 
rounding the 6 deeply bifid styles. Caps. 6-celled, many- 
seeded. 
2. Sthatiotes. Dioecious. Cal. 3-parted. Pet. 3. Male 
with 12 or more stamens surrounded by many aboitive ones. 
— Fem. with 6 deeply bifid styles. Berry 6-celled, many- 
seeded. 
3. AxACHARis. 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. Htdroch'aeis Linn. Frog-bit. 
1. H. Morsm-rdnee (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. VIU. E. I. 
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