Penstemon

Penstemon secundiflorus var. secundiflorus

Penstemon triflorus var. triflorus

Penstemon spectabilis var. subviscosus

Penstemon pseudospectabilis var. pseudospectabilis

Desert beardtongue

Penstemon rattanii var. rattanii

Rattan's penstemon

Penstemon subulatus

Penstemon spectabilis var. subinteger

Penstemon triphyllus var. infernalis

Penstemon triflorus

Heller's beardtongue

Penstemon triphyllus var. triphyllus

Riggin's penstemon

Penstemon virgatus var. asa-grayi

Penstemon virgatus var. virgatus

Upright white beardtongue

Penstemon tenuifolius

Penstemon concinnus

Tunnel springs beardtongue

Penstemon × hybridus

Penstemon albomarginatus

Penstemon caespitosus

Mat penstemon

Penstemon angustifolius var. caudatus

Penstemon australis

Southeastern beardtongue

Penstemon azureus var. azureus