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Rosette (botany)
In botany, a rosette is a circular arrangement of leaves, with all the leaves at a similar height.
Though rosettes usually sit near the soil, their structure is an example of a modified stem.
==Function==
Often, rosettes form in perennial plants whose upper foliage dies back with the remaining vegetation protecting the plant. Another form occurs when internodes along a stem are shortened, bringing the leaves closer together, as in lettuce and dandelion and some succulents.〔(Botany online: Features of Flowering Plants - Leaves )〕 (When plants such as lettuce grow too quickly, the stem lengthens instead, a condition known as bolting.) In yet other forms, the rosette persists at the base of the plant (such as the dandelion), and there is a taproot.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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