Plants or organisms that grow from internal tissues; in botany, plants whose growth stems develop from within the tissues rather than in concentric rings.
From endo- (within) + -gen (that which is produced or generated). This botanical term specifically refers to plants with internal growth patterns, contrasting with exogens.
Monocots like palm trees and bamboo are endogens—they grow by expanding from the inside out, which is why you can't count their rings like you can with trees that have external growth rings!
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