. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Fig. 139. (Life size) 190 GOLDFISH VAEIETIES A:N^D HETERANTHERA Hcteranthcra zosteracfolia is a very light green plant, slightly re-sembling Anacharis, but with longer, more widely separated leaves. It isa rapid grower, soon reaching the top, where it lays limp on the surfaceof the water. A good oxygenator, but has never become very popular onaccount of its rambling, untidy habits. Can occasionally be had of dealers. LACE PLANT This extraordinary plant, Onviranda fenestralis, is


. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Fig. 139. (Life size) 190 GOLDFISH VAEIETIES A:N^D HETERANTHERA Hcteranthcra zosteracfolia is a very light green plant, slightly re-sembling Anacharis, but with longer, more widely separated leaves. It isa rapid grower, soon reaching the top, where it lays limp on the surfaceof the water. A good oxygenator, but has never become very popular onaccount of its rambling, untidy habits. Can occasionally be had of dealers. LACE PLANT This extraordinary plant, Onviranda fenestralis, is a native of Mada-gascar. Its dark-green skeleton leaves appear very fragile, but in realitythey are the toughest-leaved aquarium plant we know of. They are slow. Fig. 140. Madagascar Lace Plant{Life sice, half-grown) of growth and prefer a subdued light. Propagation is by division at theroot. This sometimes takes place in the aquarium, but they do best inwooden tanks. At best they are slow growers which in a way is an ad-vantage, for they eventually become rather large. The Lace- or Lattice-leaf plant is used purely for ornamental purposes, its qualities as an oxy-genator being negligible. TROPICAL AQUARIUM FISHES 101


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