TR eC SE 
1116 BENGAL PLANTS. [Lasia. . 
2321. Lasta AO nO Schott; F. B. I. vi. 550. DL. spinosa 
K. D. L. 84. Pothos . F. 1. i. 487. P. Lasva 
F. I. i. 488 
In most of the provinces. ' 
A stout, intensely prickly marsh plant. Beng. Kanta- 
kachhu; Santal. Kanta saru. 
Order CXLYI. LEMNACEZ. 
Small or minute, gregarious, aquatic herbs, scale-like or globular, 
rootless or with ca seri roots, propagated by buds or bulbils, 
rarely by seed; fronds smooth above, spongy below. Flowers 
cells superposed ; dehiscence by transverse slits. ¢ Ovary sessile, 
1-locular, narrowed into a funnel-shaped style; stigma simple; 
ovules 1-7, basal, erect or horizontal. Fruit a minute, flask- 
shaped utricle, indehiscent or opening by circumscissile dehiscence. 
Seeds erect or horizontal, 1-7; testa coriaceous ; albumen fleshy, 
or absent ; embryo cylindric, axial. 
Fronds flat, with one or more roots, bearing the flowers in marginal 
clefts; anthers 2-celled ; filaments slender..............ccesceeeeeereees Lemna. 
Fronds minute, granular, rootless, proliferous, bearing the flowers on 
the upper side; anthers 1-celled, sessile Wolffia 
1013, Lemna Linn. 
Herblets, with roots rising from the sides or base of the frond. 
Flowers in marginal clefts of the frond, at first enclosed in a small 
middle, recurved; anthers 2-locular, Lee ; cells dehiscing by 
ecm slits; pollen muricate Floret solitary, close to 
m: ary 1—7-ovuled; ovules stiliapoce semi-anatropous, or 
pearl Fruit a 1-7-seeded utricle. Seeds erect or hori- 
zontal; embryo conic or ovoid. 
*Rootlet solitary :—{p. 1117] 
Fronds asymmetric, obovate or obovate-oblong ; seed erect 
paucicostata. 
Fronds symmetric, young hastate, persisting, the others set crosswise 
to the young, oblanceolate, tip serrate ; seed horizontal......... trisulca. 
* 
