Lewis Mockorange is an irregularly rounded to upright deciduous shrub, growing about 6 to 8 feet tall and 4 to 5 feet wide. Clusters of fragrant, white flowers appear in late May to early June. Leaves are a soft, dull green with a yellow fall color. Bark is reddish to orange-brown, with mature wood displaying exfoliating bark. A western native it was discovered by Meriwether Lewis and named in his honor. 'Cheyenne' is a selection from the Cheyenne Research Center in WY chosen for its flowering.
Grow in well drained, loamy soil in full sun to light, filtered shade. Adapted to gravelly and rocky soils. Adaptive to moderately high soil pH. If pruning is necessary, do so selectively, or perform renovative pruning after blooming (see Guides).