riants of the Punjnh. 



641 



WATER PLANTS. 

 Herbs Unbranched, 



Petals ununited. 



Triglochin 

 maritimum, 



Naiadece^. 

 F. B. I. vi. 563. 

 Hima'ava, 

 12.16,000 ft. 

 In marshes. 



like the last species, but larger, stouter, more tuber- 

 ous at the base, leaves si ghtly flattened at the tip, flowers 

 larger, carpels 6. 



Aponogeton 

 monostachyon, 



^'^AIADACE.E. 



F. B. I. vi. 564. 

 The Plains. 

 In tanks. 



Petals none. 



submerged, rootstock tuberous ; leaves 3-6 in., floating, 

 oblong, short-pointed or blunt, base wedge-shaped, rounded 

 or notched ; flowers white, on sessile single or double spikes 

 on a long stalk, young spikes enclosed in a conical sheath 

 which soon falls off, sepals 3, ovate with a broad tip to 

 lanceolate, petals none, stamens 6, fruit of 3 smooth leathery 

 carpels, seeds 4-8. 



Aponogeton erispum, Uke the last species, but leaves much larger, 1-3 ft., 



Naiadace^. submerged, Imear-oblong to lanceolate, thin, transculent, 



F. B. I. vi. 564. flat or undulate, spike sohtary, sepals much longer than 



The Plains, in the three to four smooth 1 -2 -seeded follicles, 

 tanks. 



Herbs Leafless. 



Petals none. 



Lemna minor, 

 Lesser Duckweed, 



Lemnace^. 

 F. B. L iv. 556. 

 The Plains to 

 9,000 ft., 

 instagnant water. 



minute, floatmg, growing in colonies bearmg a leaf-Hke 

 frond and one single root-fibre with a root cap ; the frond 

 |-^ in. long, broadly ovate or oblong, nearly flat on both 

 surfaces, green above ; flowers in the margmal cleft of the 

 frond, at first enclosed in a minute sheath (spathe), sepals 

 and petals none, stamens 2, style long, ovule one ; fruit c 

 bottle-shaped utricle with one leathery seed. This piant 

 is generally propagated by buds, which appear in the 

 groove at the back of the frond. 



