Lomatium cuspidatum (Wenatchee desertparsley)[1] is a perennial herb of the family Apiaceae, native to the U.S. state of Washington.

[3] Flowers appear early in the growth season (May to June) and are held above the foliage in a compound umbel on thick fleshy stalks that arise from the base of the plant.

[3] Similar plants with yellow flowers and flatter leaflets that grow in the northern Wenatchee Mountains on non-serpentine soil are now classified as a distinct species Lomatium roneorum.

[5] Due to seasonal dryness, slope instability, and the unusual mineral composition of serpentine-related rocks, such slopes support a sparse and very restricted flora, including four species found only in this region (Lomatium cuspidatum, Chaenactis thompsonii, Oreocarya thompsonii, and Poa curtifolia).

[5] Several other plants are less narrowly restricted but are notably associated with serpentine soils and bedrock outcrops in the Wenatchee Mountains, including Polystichum lemmonii, Ivesia tweedyi, Androsace nivalis, Adiantum aleuticum, Aspidotis densa, Galium serpenticum, and Claytonia megarhiza.