82. HXDaOOHAKIDACB^. 339 



Order LXXXII. HYDEOCHAEIDACE^. 



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

 nous. Ovary solitary, inferior; placentas parietal sometimes pro- 

 jecting into the centre of the ovary. Stig. 3 — 6. Fr. dry, or suc- 

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

 Albumen 0. Embryo straight, cylindrical. — No raphides. 



1. Hydeocharis. Dioecious. Cal. 3-parted. Pet. 3. Male 

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

 — Fern, with 3 abortive iilaments and 3 fleshy scales sur- 

 rounding the 6 deeply bifid styles. Caps. 6-celled, many- 

 seeded. — L. floating, orbicular. 



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

 with 12 or more stamens surrounded by many abortive ones. 

 Fern, with 6 deeply bifid styles. Berry 0-celled, many- 

 seeded. — L. swordshaped. 



3. Anacharis. Dioecious. Fl. from tubular bifid spath. 

 Cal. 3-parted. Pet. 3. " Male. Sep. ovate-oblong. Pet. 

 Unear or none. Stam. 9; filaments combined into a column 

 below." — Fem. with a long filiform tube, 3 abortive fila- 

 ments and ligulate stigmas. Caps. l-ceUed, few-seeded. — 

 L. oval-oblong, in whorls. 



1. HrDEOGH'AEis lAtin. Frog- bit. 



1. H. Morsus-rdncs (L.).—E. B. 808. . R. vii. 62.— Floating. 

 With runners bearing tufts of stalked roundish-reniform entire 

 leaves. Fl. white, delicate, springing from a pellucid membra- 

 nous sheath. Seeds covered with beautiful prominent spirally 

 twisted cells.— Ponds and ditches. P. VII. VIII. E. I. 



2. Straiio'ies Linn. Water-Soldier. 



1. 8. aloides (L.) ; 1. swordahaped-triangular ciliate-spinous. 

 — -E B. 379. It. vii. 61. — Creeping in the mud. L. many, 

 rigid. Stalk compressed, 5 or 6 in. high, with two 1. near its 

 summit. Fl. white, delicate. The plant rises to the surface of 

 the water to flower, and sinks again afterwards. — Fen-ditches 

 in the East of England ; naturaUzed in Scotland and Ireland. 



P. vn. E. [s. I.] 



3. Anach'aeis Rich. Water-Thyme. 



*1. A. Alsinas'trum (fiab.) ; 1. 3 inawhorloval-ohlongblunt 

 serrulate, fem. fl. from a tubular bifid spath many times ex- 

 ceeding the sessile germen, sep. and pet. broad nearly equal, 

 stigmas reflexed.— ^. N. H. ser. 2. i. t. 8. E. B. S. 2993. 

 Ehdea Rich. ? — st. long, branching ; whorls of leaves many, 



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