Location: Left bank of Wolf River, just below Red Rock Falls, 2.2 km E of Wolf River Bridge on Spruce River cut-off, 22 km NW of Dorion Post Office, Ontario.
District Located: not specified
Longitude/Latitude: 88.91666W / 48.91666 N
Habitat: Rocky rim to riverbank just below falls. Collected at same site as 18902.