MANAGEMENT OF AQUAEIUMS 251 



Among tender aquatics, that is those not hardy but 

 very effective for an aquarium, are to be found the 

 following: Aporiogeton distachyus, or the Cape Cod 

 pond-weed, a winter-flowering plant having pretty 

 white blossoms; LimnanthemMm indicum, or water 

 snow-flake, whose leaves float like those of the water- 

 lily and whose flowers are white; MyriophyUum 

 proserpinacoides or parrot-feather, a graceful foliage- 

 plant ; and Pistia stratiodes, or water-lettuce, a float- 

 ing plant like the duck-weeds. 



The following are not merely desirable for an 

 aquarium kept in the house but have the additional 

 advantage of being hardy : AUsma piantago, or water- 

 plantain, with pale rose blossoms ; Juncus vanegatus, 

 or variegated rush, a very striking plant which grows 

 both in and out of the water; LimncmtJiemvm lacun- 

 osum, or floating-heart, a white-flowered plant; Men- 

 zanthes trifoliata, a three-lobed, white-blossomed 

 aquatic; and Sdrpus vanegatus or variegated Siber- 

 ian rush. 



