Penstemon campanulatus subsp. subglandulosus (Cav.) Willd. subsp. subglandulosus (S.S.White) Straw, determined by F.S. Crosswhite 1970oak grassland Fls. blue and whit
Penstemon tenuis, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivate...
Penstemon tenuis, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon wrightii, plants in habitat. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon gentianoides subsp. leonensis (Kunth) G.Don subsp. leonensis (Straw) Crossroads, determine...
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 davidsonii var. praeteritus Greene var. praeteritus Cronq.Rocky granitic point Plants for...
Penstemon gracilis is a(n) perennial herbaceous, which grows 2 dm to 5 dm in height. This species is...
Penstemon grandiflorus is a(n) perennial herbaceous, which grows 5 dm to 9.5 dm in height. This spec...
occurrence, and use. The genus Penstemon comprises about 230 species of perennial herbs and subshrub...
Penstemon gairdneri var. oreganus Hook. var. oreganus A.GraySee D.D.Keck Am. Mid. Nat. 23 5951940 Fo...
Penstemon hintonii subsp. hintonii Straw subsp. hintonii StrawPine forest 1 m. hig
Penstemon amphorellae Crosswh.Dry, rocky chaparral. Flowers pale blue, shading gradually to deeper ...
Penstemon spectabilis subsp. subinteger Thurb. ex A.Gray subsp. subinteger Keck, determined by C.C. ...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon tenuis, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivate...
Penstemon tenuis, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon wrightii, plants in habitat. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon gentianoides subsp. leonensis (Kunth) G.Don subsp. leonensis (Straw) Crossroads, determine...
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 davidsonii var. praeteritus Greene var. praeteritus Cronq.Rocky granitic point Plants for...
Penstemon gracilis is a(n) perennial herbaceous, which grows 2 dm to 5 dm in height. This species is...
Penstemon grandiflorus is a(n) perennial herbaceous, which grows 5 dm to 9.5 dm in height. This spec...
occurrence, and use. The genus Penstemon comprises about 230 species of perennial herbs and subshrub...
Penstemon gairdneri var. oreganus Hook. var. oreganus A.GraySee D.D.Keck Am. Mid. Nat. 23 5951940 Fo...
Penstemon hintonii subsp. hintonii Straw subsp. hintonii StrawPine forest 1 m. hig
Penstemon amphorellae Crosswh.Dry, rocky chaparral. Flowers pale blue, shading gradually to deeper ...
Penstemon spectabilis subsp. subinteger Thurb. ex A.Gray subsp. subinteger Keck, determined by C.C. ...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon tenuis, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivate...
Penstemon tenuis, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon wrightii, plants in habitat. Family Scrophulariaceae, Subclass Asteridae. Origin: Native