Having threadlike tubers or root structures that hang down from the main roots, as seen in certain plants like meadowsweet.
Derived from 'filipendula' plus the Latin adjective suffix '-ous,' maintaining the botanical reference to thread-like hanging structures.
This ultra-specific botanical word shows how scientists create precise language to describe nature's details—it's the kind of word that makes a botanist's job describing plants much easier and more accurate.
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