Apiastrum

{{Short description|Genus of flowering plants}}

{{Speciesbox

|image = Apiastrumangustifolium.jpg

|genus = Apiastrum

|parent_authority = Nutt.

|species = angustifolium

|authority = Nutt.

|display_parents = 3

}}

Apiastrum is a monotypic genus of flowering plant in the family Apiaceae, containing the single species Apiastrum angustifolium, which is known by the common name mock parsley.{{citation needed|date=December 2022}} It is native to Arizona, California and northwestern Mexico,{{citation |title=Apiastrum Nutt |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew|url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30248439-2 |access-date=2022-12-10 }} where it is resident in many types of habitat. This is an annual herb producing a branching stem up to half a meter tall from a taproot. Leaves are plentiful along the stem, each up to about 5 centimeters long and split into many narrow lobes. Several inflorescences arise from the stem, often but not always from leaf axils. The inflorescence is a compound umbel of tiny flowers each with five pointed white petals.{{citation needed|date=December 2022}}