Growing on or attached to roots, particularly describing plants or fungi that live on the surface of roots.
From Greek 'epi' (upon) + 'rhiza' (root) + '-ous' (characterized by). A botanical and mycological term describing epiphytic or epizoic relationships with root systems.
Some fungi and lichens are epirhizous—they live on tree roots without harming them, like freeloaders getting a free ride underground!
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