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Perena
From Wikipedia, the free encyclopedia
Perena (iné názvy: trvalka, trvalá rastlina, vytrvalá rastlina, trváca rastlina) je rastlina (bylina, t.j. trváca bylina, alebo drevina, t.j. trváca drevina) plodiaca v niekoľkých za sebou idúcich vegetačných obdobiach (rokoch). Nadzemné časti na jeseň odumierajú, v zime pretrvávajú korene, podzemky, hľuzy.
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