Browse photos by Paul Slichter:
Collinsia
Gratiola
Gratiola ebracteata – 3 photos
Nothochelone
Penstemon
Penstemon ovatus – 5 photos
Penstemon rupicola – 3 photos
Plantago
Tonella
Tonella tenella – 3 photos
Veronica
Veronica americana – 3 photos
Veronica cusickii – 3 photos
Veronica paysonii – 1 photo
Veronica persica – 2 photos
Veronica schizantha – 4 photos