/ Thesaurus / P Synonyms of penstemon rydbergii Find synonyms for: Noun1. Rydberg's penstemon, Penstemon rydbergii, wildflower, wild flowerusage: plant with whorls of small dark blue-violet flowers; Washington to Wyoming and south to California and ColoradoWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language