316 NAIADACEZ. [ Naras. 
8. ZANNICHELLIA, Linn.; Fi. Brit. Ind. vi, 568. Grebner, 
Pflanzenreich IV, 11, p. 153. 
Aquatic slender herbs of brackish or fresh water. Leaves submerged, 
linear, pseudoverticillate at the flowering nodes; stipules amplexi- 
caul or sheathing. Flowers moncecious, minute. Male flowers 
pedunculate, perianth 0, anthers adnate to the excurrent connectives. 
Female flowers with a hyaline cupular perianth, carpels 1-8 usually 4, 
style short or long, stigma peltate, ovule solitary, pendulous. Fruit 
of compressed coriaceous carpels, seed oblong. Species 2; absent 
only in Australia. 
Z. palustris, Zinn. Sp. Pl. (1753) 969. F. B. I.-vi, 568; Prain 
Beng. Pl. 1124; Cooke Fl. Bomb. ti, 840. 
- Stem filiform, rooting. Leaves 4-3 in. long 51-74 in. wide. Pedunele 
zs in. long. Fruits distinctly stipitate, tipped with a long style. 
1 
Dehra Dun (Parker). “ Punjab: Central Provinces: Behar (Hooker), 
4, NAIAS, Linn.; Fl. Brit. Ind. vi, 568. 
Submerged annual aquatic herbs. Leaves opposite or whorled, 
sessile, Flowers minute, usually moneecious. Male flowers perianth 
double, outer tubular or inflated, entire or 4-fid or wanting, inner 
hyaline. Siamen 1, adnate to the inner perianth, anther 4-, rarely 
l-celled. Female flowers perianth 0 or hyaline and adnate to the 
solitary sessile carpel, style cylindric, stigmas 2 or 3, ovule basal 
erect anatropous. Fruit an oblong achene. Seed hard, embryo 
straight. Species 32, cosmopolitan. 
Leaves coarsely toothed, almost pinnatifid. 
Flowers diceecious. : : : - L. N. marina. 
Leaves finely toothed. Flowers moneecious. 
Leaves with 6-10 teeth on each side. An- 
thers 1-celled : 2. N. minor. 
Leaves with 30-50 minute episiel on pene 
side. Anthers 4-celled . : : . 38. N. graminea. 
1. N. marina, Linn. Sp. Pl. (1753) 1015; Rendle, Pflanzenr. 
IV, 12, 7. N. major, Allione. F. B. I. vi, 569; Prain, Beng. 
Tl. Tien 
