Isocarpha fistulosa is a New World species of plants in the family Asteraceae. It has been found only in Peru and Ecuador.David J. Keil & Tod F. Stuessy. 1981. Systematics of Isocarpha (Compositae: Eupatorieae). Systematic Botany (1981) 6(3): pp. 258-287 descriptions, line drawings, distribution maps for all 5 species
Isocarpha fistulosa is an annual herb up to tall. Leaves are up to long. One plant produces several flower heads, each head with 120–150 white disc flowers but no ray flowers.
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