geophyte

JEE-oh-fyt
A plant that survives unfavorable seasons as a bulb, corm, tuber, or rhizome underground — hiding its living tissue beneath the soil until conditions improve. Crocuses, tulips, bluebells. The geophyte's strategy is retreat: go deep, go dormant, wait.
Etymology
Greek ge (earth) + phyton (plant). An earth-plant.
ecology flora Greek
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