Plantaginaceae | |
Penstemon heterodoxus subsp. cephalophorus
| (Greene) D.D. Keck | Amer. Midl. Naturalist 33(1): 165 | 1945 |
Plantaginaceae | |
Penstemon heterodoxus var. cephalophorus
| (Greene) N.H. Holmgren | Brittonia 44(4): 482 | 1992 |
Plantaginaceae | |
Penstemon heterodoxus subsp. heterodoxus
| | | |
Plantaginaceae | |
Penstemon heterodoxus var. heterodoxus
| | | |
Plantaginaceae | |
Penstemon heterodoxus var. shastensis
| (D.D. Keck) N.H. Holmgren | Brittonia 44(4): 482 | 1992 |