Beardlip Penstemon, Red Penstemon: Penstemon barbatus
Scarlet Bugler: Penstemon centranthifolius
Cleveland's Beardtongue: Penstemon clevelandii var. clevelandii
San Jacinto Beardtongue: Penstemon clevelandii var. connatus
Mohave Beard's Tongue, Mojave Beardtongue: Penstemon clevelandii var. mohavensis
Eaton's Penstemon, Firecracker Penstemon: Penstemon eatonii (several subspecies)
Narrowleaf Penstemon, Linarialeaf Penstemon, Toadflax Penstemon: Penstemon linarioides
Palmer's Penstemon,Scented Beardtongue, Scented Penstemon: Penstemon palmeri
Parry's Beardtongue: Penstemon parryi
Arizona Penstemon, Canyon Penstemon, Desert Penstemon: Penstemon pseudospectabilis
Beaked Penstemon, Bridge Penstemon, Mountain Scarlet Penstemon: Penstemon rostriflorus (Synonym: Penstemon bridgesii)
Arizona Scarlet-bugler, Hackberry Beardtongue: Penstemon subulatus
Thompson's Beardtongue, Thompson's Penstemon: Penstemon thompsoniae
Thurber's Penstemon: Penstemon thurberi (Synonym: Penstemon thurberi var. anestius)
Upright Blue Beardtongue: Penstemon virgatus