T. P. Petushkova

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440 The water chestnut, Trapa natans L. (Trapaceae Dumort.) is a Tertiary relict whose fate is a matter of major concern. This plant is listed in the Red Data Books of the Soviet Union (Krasnaya kniga..., 1984) and the Tver Region (Krasnaya kniga..., 2002), where it has the status of species decreasing in abundance. The water chestnut grows in slowly(More)
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