CLXix. ALiSMAOE^. (J. D. Hooker.) 561 



3. SAeXTTABXA, Limn. 



Erect stemless, iisTially perennial water plants. Leaves Iqng-petioled, 

 elliptic cordate or sagittate. Flowers in panicled or spicate whorle, 

 unisexual or polygamous. Sepals 3, herbaceous. Petals 3, membranous, 

 deciduous. Stamens 6 or more ; filaments filiform, compressed. Car- 

 pels very many, crowded on a large globose or oblong receptacle, 

 laterally flattened ; style ventral or apical, stigma papillose ; ovules solitary,, 

 basilar. Fruit a globose or oblong head of flattened crested or winged 

 achenes. Seeds erect, testa thin ; embryo hippocrepio. — Species about 15, 

 temperate and tropical. 



1. S. sagrittifolia, Linn. ; leaves hastate or sagittate, achenes flat 

 dorsally winged. Kwnth Bnium. iii. 156 ; Ftainh. Fl. Ind. iii.. 645 ; Wall. 

 Gat. 4991 ; Beichh. Fl. Oerm. vii. t. 53 ; Boiss. Fl. Orient, v. 11 ; Micheli 

 m A.DC. Monogr. Phan. iii. 66.. S. hermaphrodita. Mam. in Wall. Gat. 

 I. c. S. hastata, JDon Prodr. 22. S. Doniana, Sweet, Sort. Brit. 1826. 



In tanks, &c., throughout the plains of India from the Panjab to Bengal and 

 Muunipore.— DiSTElB, Europe, N. Asia, N. America. 



Leaves obtuse or acute, 2-8 in. long, very rarely elliptic or lanceolate, lobes more 

 or less diverging ; petiole 8-18 in., trigonous. Scape 6-18 in., with 3-5 whorls of 

 3-5 flowers each ^ ia. diam. ; lower whorls fem., upper male, with longer pedicels ; 

 bracts short, obtuse. Mowers f in. diam. ; petals white, claw often purple. Achenes 

 obliquely obovate, apiculate, wings broad entire or subcrenate. 



2. S. gruayanensis, Sumb. Bonpl. & Kunth, Nov. Gen. & Sp. i. 250 ; 

 leaves floating broadly ovate deeply cordate obtuse, achenes flat surrounded 

 by a broad toothed wing. Kunth Fnum. iii. 161. S. cordifolia, Bpxb. Fl. 

 Ind. iii. 647; Kiimih I. e. S, Lappula, Bon. Prodr. 22. S. parviflora, 

 Wall. Cat. (ex Micheli). Alisma ? Hamiltonianum and cristatum, Wall. 

 Cat. 4993, 4994, 4995. A. stellatum and pubescens, Sam. ex Wall. Cat. 

 4993, 4995. Lophiocarpns guayanensis, Mioheli in A.DC. J^onogr. Pha/ti. 

 iii. 62. 



In tanks and marshes, throughout the plains of India, to Bttsma and the 

 Malay Peninsula, but not very common ; (not in Ceylon). — Distbib. Malay Islands, 

 China, trop. Australia. 



Petioles, scape, and pedicels often more or less hairy. Jjeaves 1-2 in., mem- 

 branous, lobes broad acute or obtuse, sinus broad or narrow ; nerves radiating, 

 obscure ; petiole long or short. Scape 6-18 in., stout. Flowers f in. diam., white, 

 in few approximate Irregular whorls ; pedicels short, very stout ; flowers of the lower 

 whorls usually temate, bisexual, 9-12-androus, of the upper more numerous, male, 

 6-10-androus. Petals obovate, erose. Anthers cordate at the base. Ac?ienes very 

 many. 



4. WZSNEBIA, Micheli. 



Scapigerous marsh or water herbs. Leaves long-petioled, filiform 

 lanceolate or oblanceolate. Flowers minute, monoecious, in remote involu- 

 crate whorls on a very slender rachis ; involucre campanulate, truncate, 

 membranous. Sepals 3, equal or one larger, persistent. Petals 2-4, 

 equalling or smaller than the sepals. Male tl. Stamens 3. Pistillodes 

 subulate. Fem. pl. Staminodes Betuceoua. Carpels 3-6, erect, ovoid; re- 

 ceptacle small tumid ; style 0, or terminal, short, stigma minute ; ovule 

 solitary, basilar. Achenes and seed subglobose or compressed; embryo 

 conduplicate, hyppocrepic. — Species 3, Trop. Asia, Africa, and Madagas- 

 car. 



VOL. VI. 



