''Prionosciadium watsonii'' is a plant species known from the Mexican states of

Durango Durango, officially the Free and Sovereign State of Durango, is one of the 31 states which make up the Political divisions of Mexico, 32 Federal Entities of Mexico, situated in the northwest portion of the country. With a population of 1,832,650 ...

and

Sinaloa Sinaloa (), officially the (), is one of the 31 states which, along with Mexico City, compose the Federal Entities of Mexico. It is divided into 18 municipalities, and its capital city is Culiacán Rosales. It is located in northwest Mexic ...

. ''Prionosciadium watsonii'' is a biennial herb with a large

taproot A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproot ...

. Leaves are compound with narrowly lanceolate, some of the leaflets with narrowly lanceolate lobes. Flowers are borne in

umbels UMBEL (Upper Mapping and Binding Exchange Layer) is a logically organized knowledge graph of 34,000 concepts and entity types that can be used in information science for relating information from disparate sources to one another. It was retired ...

on the tips of branches.Field Museum, Neotropical Herbarium Specimens
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References

Apioideae Endemic flora of Mexico Flora of Durango Flora of Sinaloa Taxa named by John Merle Coulter {{apiaceae-stub