1122 BENGAL PLANTS. (A ponogeton. 
short; stigma discoid or decurrent, persistent; ovules basilar, 
anatropous. Fruit of 3 or more coriaceous follicles. Seeds erect; 
embryo straight. 
Leayes floating, oblong, ae nerved, opaque; sepals 2, pink or white, 
shorter than the three follic 
Cross-nervules of leaves po follicles smooth, 4-8-seeded 
monostachyon. 
Cross-nervules of leaves obsolete ; follicles echinate, 2-seeded 
echinatum. 
Leaves submerged, linear-oblong to lanceolate, 3-7-nerved, translucent 5 
cross-nervules distinct ; sepals 1-3, white, longer than the 3-4 smooth, 
1-2-seeded follicles crispum, 
2335. APONOGETON MONOSTACHYON Linn. f.; F. I. ii. 210; F. B. I. 
vi ae rma A. 1242. 
all ae hari 
An aqua ig ” Hind. Jhechu 
2336. (Ne ECHINATUM Roxb. ; Fr. Li. 210; FB. d- 
vi. 564. 
C. Bengal. 
An aquatic herb. 
2337; Papert cCRISPUM Thunb.; -F. B: L. vi. 564. A. undu- 
lat F. L. it, 241, 
Tirhut ; N. Bengal; C. Bengal; E. Bengal. 
An aquatic herb. . 
1020. Potamogeton Linn. 
Herbs, aquatic, submerged, with creeping rootstock; leaves 
submerged or floating, opposite or alternate, entire or toothed, 
with Ee aicllacsuvk stipules. Flowers small, hermaphrodite, 
spicate on a scape, rising from a membranous spathe; bracts 0 
Perianth of 4 concave, green, valvate segments. Stamens 4; 
anthers sessile on the perianth-segments, didymous, the cells 
opening by extrorse slits. Carpels 4, sessile, 1-celled and 1-ov ruled ; 
stigma subsessile or evento on a style, persistent; ovule cam- 
pylotropous, adnate to inner angle of carpel. Fruit of small, 
coriaceous or _— drupelets. Seed subreniform; embry° 
straight. 
*Upper leaves floating :—[p. 1123 
t+Floating leaves large, coriaceous ; submerged leaves lanceolate, mem 
branous [p. 1123] indicus. 
pe eweneeres 
