Penstemon gairdneri var. oreganus Hook. var. oreganus A.GraySee D.D.Keck Am. Mid. Nat. 23 5951940 For Most Recent Revisio
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, flower close-up. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon jamesii subsp. breviculus Benth. subsp. breviculus Keckon dry plains below tow
Penstemon hirsutus f. albiflorus (L.) Willd. f. albiflorus Farw., determined by F.S. Crosswhite 197
Penstemon murrayanus, lower leaves. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, inflorescence, showing connate-perfoliate bracts. Family Scrophulariaceae, Sub...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon eatonii, leaves and bracts. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, flower close-up. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon jamesii subsp. breviculus Benth. subsp. breviculus Keckon dry plains below tow
Penstemon hirsutus f. albiflorus (L.) Willd. f. albiflorus Farw., determined by F.S. Crosswhite 197
Penstemon murrayanus, lower leaves. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, inflorescence, showing connate-perfoliate bracts. Family Scrophulariaceae, Sub...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon eatonii, leaves and bracts. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon murrayanus, flower close-up. Family Scrophulariaceae, Subclass Asteridae. Origin: Native