Prionosciadium watsonii is a plant species known from the Mexican states of Durango and Sinaloa.J.M. Coulter & J.M. Rose Proceedings of the American Academy of Arts and Sciences 25: 150. 1890.CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City.
Prionosciadium watsonii is a biennial herb with a large taproot. Leaves are compound with narrowly lanceolate, some of the leaflets with narrowly lanceolate lobes. Flowers are borne in umbels on the tips of branches.Coulter, John Merle, & Rose, Joseph Nelson. Proceedings of the American Academy of Arts and Sciences 25: 150. 1890.Mathias, M. E. & L. Constance. 1973. New and reconsidered Mexican Umbelliferae. Contr. Univ. Michigan Herb. 11(1): 1–24Field Museum, Neotropical Herbarium Specimens
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