In a manner relating to plants that live inside other plants without harming them; in the way that endophytic organisms behave.
From endophytic (endo- 'within' + Greek phyton 'plant') + -ally (adverbial suffix). The term emerged in the 19th century as botanists studied fungal and bacterial associations with plants.
Many plants you see every day have hidden fungal roommates living inside their tissues—endophytically, these fungi help their hosts survive droughts and resist diseases, yet we barely noticed them until modern microscopy revealed this secret symbiotic world.
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