Penstemon barbatus var. barbatus (Cav.) Roth – beardlip penstemon
Lamiales of North America Update, database (version 2011)
Updated for ITIS by the Flora of North America Expertise Network, in connection with an update for USDA PLANTS (2007-2010)
Penstemonbarbatus var. barbatus
Journal/Book Name, Vol. No.:
Continental US, Native
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