838 cxLiY. na.iadace;e. 



including the claw which is nearly as long as the limh ; limb 

 siiborbicular, -jV'T^^^' ^^' broad, concave. Drupelets ^ in. long, obUquely 

 truncate, shortly beaked. F). B. I. v. 6, p. 565 ; Grab. Cat. p. 200 ; 

 Dalz. & Gihs. p. 248 ; Trim. Fl. Ceyl. v. 4, p. 373 ; Woodr. in Journ. 

 Bomb. Nat. v. 13 (1901) p. 429 ; Prain, Beng. PI. p. 1122.— Flowers : 

 Dec. 



rrettv pommon in tanks and ponds. Deccan : water-lioles of the high hill forta 

 of tlio Western Deccan, I)(dzell cf- Gihson ; Poena, Woodrow !, Cooke ! — Distrib. 

 Throughout the plains of India ; Cej'lon, Malay and Sandwich Islands. 



2. Potamogeton perfoliatus, Linn. Sp. PL (1753) p. 126. Stem 

 stout, terete, slightly branched. Leaves 1-2^ by |-1 in., sessile, ovate- 

 lanceolate, obtuse, membranous, translucent, amplexicaul, base cordate, 

 5_9_iierved ; stipules small, caducous. Peduncle stout, short, not 

 tliickened upwards. Spikes dense-flowered, 4-g in. long. Sepals with 

 long claws, elliptic-obovate. Drupelets ^ in. long, obliquely ovoid, 

 hardly keeled, slightly compressed, with a short usually curved beak. 

 Fl. B". I. V. 6, p. 566 ; Dalz. & Gibs. p. 248 ; Ecichb. Icon. Fl. Germ. 

 V. 7 (1845) p. 19, t. 29 ; Syme, Eiig. Bot. ed. 3, v. 9 (1869) p. 42, 

 t. 1412 ; Woodr. in Journ. Bomb. Nat. v. 13 (1901) p. 429.— Flowers : 

 Dec.-Feb. 



Deccan ; in the stream round Dapuri garden near Pooua, Bcdzell ^- Gihson ; Poona, 

 Cookel, JVoodroivl Sind : Jemadar ka Landa near Karachi, Sfocks, 380! — Distuib. 

 India (W. Himalaya, W. Tibet, W. Peninsula) ; N. temperate regions, Australia. 



3. Potamogeton crispus, Linn. /S^?. PI. (1753) p. 126. Stem 

 branched, compressed. Leaves 1-3 by |-| in., all submerged, semi- 

 amplexicaul, linear or linear-oblong, obtuse, with crisped and finely 

 serrulate margins, 3-nerved, translucent ; stipules small, caducous. 

 Peduncle long, often cui'ved, taperiug upwards. Spike ^-3 in- long, 

 few-flowered ; flowers small. Sepals clawed, j^ in. long including the 

 claw ; limb suborbicular. Drupelets obliquely ovoid, | in. long, 

 terminated by a slightly recurved compressed beak. Fl. B. I. v. 6, 

 p. 566; Dalz."& Gibs. p. 248; lleichb. Icon. Fl. Germ. v. 7 (1845) 

 p. 18, tt. 29, 30; Syme, Eng. Bot. ed. 3, v. 9 (1869) p. 43, t. 1413; 

 AVoodr. in Journ. Bomb. Nat. v. 13 (1901) p. 429 ; Prain, Beng. Pi. 

 p. 1123; Watt, Diet. Econ. Prod. v. 6, part l,p. 331. Potamor/eton 

 tulerosus, lioxb. Hort. Beng. (1814) p. 12 ; Grah. Cat. p. 200. 



KoNKAN : tanks in tlie Konkans, Dalzcll cf- Gihson. Deccan : Poona, Woodrow. — 

 D18TKIB. Plains of India and temperate Himalaya ; North and South temperate and 

 subtropical regions. 



4. Potamogeton pectinatus, Linn. Sj). PL (3 753) p. 127. Stem 

 filiform, copiously distichously branched, forming witli the leaves tassel- 

 like masses when taken out of the water. Leaves all submerged, 

 alternate, 1-0 by -jV^Tu ^'^•' i^f-i'i'o^vly linear or filiform, acute, opaque, 

 1-3-nerv'ed or the lower sometimes 5-uerved ; stipules adnate to the 

 leaf-sheaths, the tips free. Peduncle with the spike 2-3 in. long, 

 filiform, usually longer than the leaves, not thickened upwards; flowers 

 few iu few distant whorls, minute, green. Sepals suborbicular. 

 Drupelets ^-y. in. long, turgid, dimidiate-obovoid, slightly compressed, 

 ehort ly braked, rounded and obscurely 3-keele<.l on the back, with a very 



