Plant
Lewis’s syringa, Lewis’s mockorange
Philadelphus lewisii
Habitat
Clearwater Co., ID in May; Blackfoot River Valley in early July
Conservation
Secure
First Observed
1806-07-04
Fragrant white blossoms adorn this shrub in early spring. Found west of Continental Divide. Named for Lewis.
In the NPS atlas of species the expedition described
Lewis' syringa, Lewis' mockorange
Found in Clearwater county, ID in May and the Blackfoot River Valley in July. Fragrant white blossoms adorn this shrub in early spring. Found west of the Continental Divide. It was named for Lewis.
Source: National Park Service, Lewis and Clark National Historic Trail Park Atlas.
Recent sightings
Where it’s being seen today
2 research-grade iNaturalist observations between 2019–2025. Most recent: 2025-07-06. Sourced from Terrain360 trail captures, cached locally.
