Potamogeton.) CLXX. NAIADAQEA. (J . D. Hooker.) 567 
long, Spike very short, few-fld.; flowers very small Drupelets } in., obliquely 
ooid, compressed, ribs entire or toothed. 
7, P. lucens, Linn. Sp. Pl. 126; stem stout, leaves large subsessile 
dlong-lanceolate cuspidate undulate serrulate many-nerved, peduncle 
stout thickened upwards, spike stout, drupelets small turgid shortly beaked. 
ian me. ili, 132; Reichb. Ic, Fl. Germ. vii. t. 36, 37,40; Boiss. Fl. 
. Y. 16. 
y ASIE, alt. 5-6000 ft., Jacquemont, &c. Kumaon, alt. 6400 ft., Strachey 4 
iterbottom.—DistR1B. N. temp. regions, Australia. . . 
; ) branched. Leaves 4-10 in., very variable, upper opposite sometimes float- 
Zi stipules large, long, 2-winged or -keeled. .Drupelets Je in, convex on both 
obtusely beaked, 
8. P. mucronatus, Presl Epimel. 245; leaves all submerged longer 
Sr petioles, elliptic- or oblong-lanceolate acute or cuspidate 
anne many-nerved base acute or obtuse, stipules much longer than 
* petiole lanceolate connate, peduncle very long, spike of interrupted 
ws or whorls of flowers. P. malaianus, Mig. Ill. Fl. Archip. Ind. 46. 
“teens, Ham. in Wall. Cat. 5176. 
Philipp, Teta at Dinagepore and Kulna and Karnata, Hamilton.—DistTR1B. Borneo 
ile? 3-5 by 4-3 in., 5-9 or more-nerved, blade twice or thrice as long as the 
ha : stipules i Ce 14-2 in.; ' flowers laxly erowded or whorled. 
good suborbicular, very shortly clawed. Fruit }-orbicular, shortly beaked.—Has a 
e aspect of P. lucens, to which Hamilton referred it. The specimens 
poor, and insufficient for a satisfactory diagnosis. 
* Leaves all submerged, very narrowly linear or filiform. 
TM 2 pectinatus, Linn. Sp. Pl. 197; leaves filiform acne opaque 
drapelet, ; margins slightly thickened, stipules adnate to the leaf-s 
Reich} large turgid smooth hardly beaked. Kunth Enum. iii, 7; 
PI, 145 le. FT, Germ. vii. t. 19; Boiss. Fl. Orient. v. 18; Aitch. Cat. Panja 
Rat, ` marinus P, Ham. in Wall. Cat. 5179 A, B in part. Ruppia 
SUIS Thw. Enum, 338, in part. l 
Dau tt of INDIA, the HIMALAYA, and WESTERN and EASTERN TIBET, alt. 12- 
` YLON ites. — . most regions. . 
tem filiform, densely e Leaves 3-8 by dech in» lower 
Vlog T 5-nerved, Peduncle not thickened upwards; flowers interruptedly 
` Drupelets i in., dimidiate-obovoid. 
Zë, Pusillus, Linn. Sp. Pi. 127; leaves narrowly linear or filiform 
filito Usually 3-nerved membranous, stipules small free, peduncle ong 
obt et Owers few minute clustered, drupelets turgid stoutly | p» 
Boiss Peeled. Kunth Enum. iii. 196; Reichb. Ic. Fl. Germ. vii. t. 22 ; 
Kun Orient. v. 18; Wall. Cat. 5180. 
Are alt. 5000 ft., Thomson.—DisTRIB. N. and S. temp. regions. . 
Jem fliform, densely distichously branched. Leaves 4-8 in., rarely acuminate, 
ug, 7. Spike 6-10-fld: Drupelets obliquely ovoid. | 
end, "d Wellatus, Hook. f., Students’ Brit. Fl. 436; leaves j'y in. road "e - 
fit, iy. 115 fabellatus, Bab. in Proc. Linn. Soc. Ser. ii. (1853), mom ; in ` to o- 
Pata, ar P. marinus? Ham. in Wall. Cat. 5179 B, in part.—Upper Bengal; 
Wich, The Panjab, Thomson.—DIsTRIB. Britain, 
