U.S.A., Oregon, Douglas, Myrtle Island Research Natural Area, 11.3-ha island in the Umpqua River, at the end of Cougar Creek Road, 7.3 km west of Bullock Bridge and OR 138.
Quercus/Cytisus/Agrostis Community in Riverwash soils. Assoc: Gastridium ventricosum, Holcus lanatus, Dactylis glomerata;