Aquarium Plants 77 



latter are almost circular with a deep nar- 

 row cut near the point of attachment. 

 Their upper surface is dark green mottled 

 with brown. The large flowers are of a 

 beautiful golden-yellow color, with darker 

 center stripes. They are deeply lobed, and 

 hairy towards the center. During the sum- 

 mer months the Limnanthemum will grow 

 well and flower in a large aquarium. It 

 passes the winter in a dormant state. To 

 thrive well it should have good, rich soil 

 and plenty of sunlight. 



Water-key (Limnocharis humboldtii) 

 comes from South America. It is a fine and 

 durable plant, growing well even in small 

 aquariums. The floating leaves are broad, 

 almost circular oval, heart-shaped at base, 

 and with a very short point at the end. The 

 middle rib is strongly pronounced. The 

 flowers are large, of a beautiful yellow and 

 have three petals. This plant, like the pre- 

 vious one, needs rich soil and a rather sunny 

 position. 



