. Goldfish breeds and other aquarium fishes, their care and propagation : a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with the text. es, raisingtheir leaves above the water. Inthe beds of rapid streams, whenexposed to a vigorous current,the leaf blades are almost entirelychanged to the form of a spade,and not infrequently all traces oflamina are absent and the leaf islengthened to form a limp, flat,pale-green ribbon much resem-bling Vallisneria. This ischaracteristic of , S. sinensis or S. gigante
. Goldfish breeds and other aquarium fishes, their care and propagation : a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with the text. es, raisingtheir leaves above the water. Inthe beds of rapid streams, whenexposed to a vigorous current,the leaf blades are almost entirelychanged to the form of a spade,and not infrequently all traces oflamina are absent and the leaf islengthened to form a limp, flat,pale-green ribbon much resem-bling Vallisneria. This ischaracteristic of , S. sinensis or S. gigantea,which are grown in aquaria andsucessfully in shaded ponds insummer. Sagittaria natans (Mul.) orFloating or Ribbon Arrowhead,Fig. 112, is a variety of and is the best of allaquarium plants, generally to behad of dealers in aquatics, whopropagate it in tanks and originates in a tuft on thebottom of the water and spreadsby runners usually in the direc-tion of the strongest light. The Fig. 112clear-green linear leaves are Floating Arrowhead, j 1 . .1 1 Sagittaria natans, with rhizoid, blossom, rruit, details of leaf nerved their entire length and and a floral leaf. Reduced 184 AQUATIC PLANTS OF FRESHWATER exhibit clearly veined and distinctly outlined cellular structure, grow-to and float immediately below or on the surface of the water, andin midsummer develop lanceolate emersed and floating floral leavesresembling those of other species of the Arrowheads. The small, incon-spicious white flowers have three petals with yellow centres and are devel-oped in 1 to 4 whorls about a long floating scape. These extend abovethe surface until the flowers are fertilized, but the fruit ripens on or belowthe surface of the water. S. natans is an exotic which may be obtainedfrom dealers and is in such constant demand that its extensive propagationwould be a profitable industry. In replanting it is advisable to take offthe partly decaying outer leaves that the y
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
