 For this reason, it is a part of the unique plant community found in the serpentine barrens of the Siskiyou Mountains, along with "Darlingtonia californica" and "Cypripedium californicum".It is usually found in wetlands although, like other rhododendrons, it does not grow with its roots submerged in water.It prefers both more moisture and more sunlight than "Rhododendron macrophyllum", an evergreen rhododendron with a similar range.