Penstemon cobaea, petals - irregular. Family Scrophulariaceae, Subclass Asteridae
Penstemon albidus, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon whippleanus, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, petals - irregular. Family Scrophulariaceae, Subclass Asteridae
Penstemon cobaea, flowers (close-up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, flowers (close-up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, didynamous stamens, furry staminode, glandular hairs on corolla. Family Scrophular...
Penstemon tenuis, glandular pubescence and markings in corolla. Family Scrophulariaceae, Subclass As...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon tenuis, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivate...
Penstemon tenuis, inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon tenuis, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon rupicola, flower. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon albidus, anthers, staminodium, position of corolla lobes in early anthesis. Family Scrophu...
Penstemon albidus, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon whippleanus, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, petals - irregular. Family Scrophulariaceae, Subclass Asteridae
Penstemon cobaea, flowers (close-up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, flowers (close-up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon cobaea, didynamous stamens, furry staminode, glandular hairs on corolla. Family Scrophular...
Penstemon tenuis, glandular pubescence and markings in corolla. Family Scrophulariaceae, Subclass As...
Penstemon sp., inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon tenuis, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivate...
Penstemon tenuis, inflorescence. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon tenuis, whole plant. Family Scrophulariaceae, Subclass Asteridae. Origin: Cultivated
Penstemon rupicola, flower. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon albidus, anthers, staminodium, position of corolla lobes in early anthesis. Family Scrophu...
Penstemon albidus, flowers (close up). Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon palmeri, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native
Penstemon whippleanus, flowers. Family Scrophulariaceae, Subclass Asteridae. Origin: Native