Platte River penstemon plat·te·ri·verpenstemon uncommon noun 1. erect plant with blue-violet flowers in rings near tips of stems; Idaho to Utah and Wyoming SynonymsPlatte River penstemonPenstemon cyananthus Related words Broader terms wildflower Parts Penstemon WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
