Add to ORKGClematis occidentalis (Hornem.) DC.clématite verticilléePurple clematisPrairie BluffT. ChisholmGrassy S. facing slope, just below scree slope1769 mAmelanchier alnifolia, Maianthemum racemosum, Eriogonum ovalifolium, Populus tremuloides, Castilleja lutescens, Lupinus sericeusUncommonAlso found on E. facing rocky outcrop of pea