Having glands on the leaves, or relating to leaves that bear glandular structures or secretions.
From Greek 'aden' (gland) + 'phyllon' (leaf). Botanists use this term to describe plants whose leaves have conspicuous glands, a visible adaptation for chemical defense or attraction.
Many aromatic herbs like mint and sage are adenophyllous—their leaves are literally dotted with tiny glands that produce the essential oils you smell, which is why you can crush a leaf and instantly get that strong scent—you're breaking open thousands of microscopic glands.
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