Prionosciadium nelsonii is a plant species known from the Mexican states of Chiapas and Morelos.

[2][3] It is a biennial herb with a large taproot.

Leaves are compound with narrowly lanecolate leaflets, some of them with narrow, tapering lobes.

The inflorescence is a compound umbel at the top of the stem.

This Apiaceae article is a stub.