248 



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CXXXII. JUNCAGINACE^E. 



1. POTAMOGETON, Linn. 



1. P INDICUS, Itoxb. Fl. Ind. 5, 452. Stem branched, creep- 

 ing, round, smooth, knotty ; leaves alternate, floral ones opposite, 

 petioled, narrow-lanceolate or elliptic-oval, shining, smooth, entire, 

 obsoletely many-nerved ; stipules solitary axillary ; sheathing as long 

 as the petioles, divided to the middle ; peduncles solitary axillary, 

 or opposite the leaves, round, thick, smooth, about as long as the 

 cylindric spike ; sepals with long claws, roundish, concave persis- 

 tent * stamina 4. Pretty common in tanks and lakes ; in water- 

 holes of the high Hill-forts of Western Deccan. 



2. P PERFOLIATUS, Linn. sp. 182. Stem round, slightly 

 branched ; all the leaves submersed and of one shape, sessile, semi- 

 amplexicaul with a cordate base, ovate or ovate-lanceolate, obtuse, 

 membranous, pellucid ; stipules united into a sheath, embracing 

 the stem; fruit rather obliquely obovate, compressed, obtusely 

 angled. In the stream around Dapoorie Garden, and most probably 

 in other streams of the Deccan; a native also of Europe, North 

 America, and New Holland. 



3. P PECTINATTJS, Linn. sp. 183. Stem round; all the leaves 

 submersed, extremely narrow, half-round and channelled, divided 

 into tubular compartments, having sheathes at the base ; spikes 

 long-peduncled, interrupted ; peduncles thread-like. In the large 

 tank at Gogo, most plentiful ; a native of Europe, Asia, and 

 America, but not seen in India by any previous observer. 



4. P CRISPUS, Linn. sp. 183. Stem branched, rather com- 

 pressed ; leaves all submersed, uniform sessile, oblong-linear, obtuse 

 or shortly acuminate, sharply denticulate, waved and crisp on the 

 margin, membranous, pellucid ; fruit obliquely and broadly ovate, 

 terminated by a slightly recurved, compressed, subulate beak. Syn. 

 P tuberosum, lloxb. Fl. Ind. i, 472. Tanks in the Concans. 



2. APONOGETON, Linn. 



1. MONOSTACHYUM, Linn. Suppl. 214. Root tuberous; leaves 

 radical, long-petioled, linear-oblong, cordate at the base, pointed, 

 entire, smooth, 3 to 5-nerved, 3 to 6 inches long and about one 

 broad ; scapes as long as the leaves ; spikes densely flowered ; calyx 

 of 2 wedge-shaped concave leaflets; flowers hexandrous; capsules 

 smooth, pointed, 1 -celled, 4 to 8-seeded. Tanks in the Dharwar 

 and Belgaum Collectorates. 



