fistulosum

Fistulosum is a Latin neuter singular form used as a specific epithet in the scientific names of various organisms. The epithet is derived from fistula, meaning a pipe, duct, or tube, and is used descriptively in taxonomy to indicate a tube-like or fistula-related feature in the organism, such as a hollow stem, tubular inflorescence, or tubular structure in fungi or other groups.

The form fistulosum is gendered; in binomial names the epithet agrees with the gender of the genus. Thus fistulosum is used with neuter genera, while masculine fistulosus or feminine fistulosa may appear with corresponding genera.

The epithet appears across multiple kingdoms, including plants, fungi, and animals, often chosen when the organism exhibits a conspicuously hollow or pipe-shaped structure. Because it is a descriptive name rather than a recurring taxon, its appearance in one genus does not imply relation to others.

For precise usage in a given taxon, consult its official nomenclature database (for plants, IPNI; for fungi, MycoBank; for animals, WoRMS or equivalents) to confirm the exact epithet form and any synonyms.