Cardamine (Cardamine lyrata) or, as it is called, Japanese core or core lyrate – Cruciferous aquarium plant (Brassicaceae).
Habitat Cardamine – Japan, Eastern Siberia, Eastern and Northern China. In nature core lyrate grows on peatlands, meadows, along the edges of areas with standing water.
Japanese core in width it grows up to 30 cm, and in height to half a meter. Stem cardamine upright, elongated, having branches. Rounded leaves in the shape of a heart of light green color have a notch on the edges.
Often, adventitious roots are formed in the leaf axils. Inflorescences are formed above the water with white flowers gathered in a brush.
The fruits of this plant are a flat pod with sash twisted in a spiral.
Cardamine feels good in the backyard pond or large in cold water aquarium. Water temperature in the range of 15-22 ° C. With short-term increases in temperature to 27 ° C, the leaves of the plant are formed smaller and longer, and the distance between them increases.
For core content of lyrate suitable weakly acid (pH 6.5-7.0) water with hardness from 3 to 10 °. Shoots are planted in nutrient soil in groups on the average plan. aquarium, in the backyard pond in shallow water or above water in a sunny wetland. During a year cardamine grows evenly, increasing monthly by about 20 centimeters.
For Japanese core content It will satisfy both natural and artificial lighting With the help of fluorescent lamps, the power of which is selected on the basis of 1 liter of water volume, the power of the lamp is 0.5 watt. Light day for this plant – 12 hours.
For the good development of cardamine soil should be saturated with nutrients. Gravel is suitable as a substrate.
Breeds core lyrate with the help of seeds thrown from the bursting pods or with the help of cuttings.