A plant that grows in or near brooks, particularly aquatic or semi-aquatic vegetation.
Compound: 'brook' plus 'weed' (from Old English 'weod,' any plant). Medieval term for plants found in brook habitats.
In medieval herbals, plants were simply named by habitat—'brookweed,' 'bogwort,' 'marshfig'—giving us a beautiful glimpse into how pre-scientific people categorized the plant world.
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