OR, THE HOME-CULTURE OF FRESH-WATER PLANTS. 
name. The large white flowers, finely blotched 
with pink in well-grown specimens, appear in July, 
and at that season would form a grand attraction to 
the Aquarium (see Plate VIII., No. 3). The plants 
of Arrowhead might he sought in their native 
brooks and ditches just before the flowering season, 
and, as they hear removal well, they need only he 
allowed, like many other plants, to occupy the Aqua¬ 
rium during the period of their inflorescence, though 
it is always worthy of culture for the beauty of its 
leaves alone. The rhizoma, or under-ground stem, 
of the Sagittaria is very fleshy , and is used for food 
in several European countries. 
The amphibious Persic arm, with its pyramidal 
spikes of pink-tipped blossoms, forms a very pretty 
object for artificial culture (see Plate VII.); as 
does also the Eeatherfoil or Water Violet. The 
last is indeed an exceedingly desirable Aquarium 
plant, its feathery leaves having a very graceful 
appearance beneath the surface, spreading their 
elegant forms about the lower portions of the tank 
like plumes of green feathers, while the flowers, 
growing in a series of whorls, appear above the 
water, and have a very pretty effect, being of a 
delicate pinkish purple, becoming yellow towards 
the centre. This plant has received its botanical 
33 D 
