Gordon's Mockorange
Philadelphus lewisii Pursh

Philadelphus lewisii, known as Gordon's Mockorange, is a deciduous shrub native to western North America and the West Himalaya. It is the state flower of Idaho.
Description
Philadelphus lewisii, also referred to as Lewis' mock-orange, wild mockorange, or Indian arrowwood, is a member of the Hydrangeaceae family. It is distributed across Alberta, British Columbia, California, Idaho, Montana, Oregon, Washington, and Uzbekistan. The species was first described in 1813 by Pursh. Common names in English include Gordon's Mockorange and syringa. It is a native plant of western North America and holds the distinction of being Idaho's state flower.
Other common names
Lewis's mock orangewild mock orangeLewis' mock-orangeGordon's MockorangeLewis Mock-OrangeLewis' mock orange
Distribution
Alberta · British Columbia · NO · SE · DK · California · Idaho · Montana · Oregon · Uzbekistan · Washington · West Himalaya
Synonyms
Philadelphus trichothecusPhiladelphus oreganusPhiladelphus oreganusPhiladelphus zelleriPhiladelphus cordifoliusPhiladelphus cordatusPhiladelphus confususPhiladelphus columbariusPhiladelphus insignisPhiladelphus globosusPhiladelphus fremontiiPhiladelphus grahamiiPhiladelphus billiardiiDeutzia californicaPhiladelphus lewisii subsp. californicusPhiladelphus lewisii subsp. gordonianusPhiladelphus gordonianusPhiladelphus californicusPhiladelphus lewisii var. californicusPhiladelphus lewisii var. gordonianusPhiladelphus platyphyllusPhiladelphus helleriPhiladelphus lewisii var. helleriPhiladelphus intermediusPhiladelphus angustifoliusPhiladelphus columbianusPhiladelphus gordonianus var. columbianusPhiladelphus lewisii var. angustifoliusPhiladelphus lewisii var. intermediusPhiladelphus oblongifolius