 Penium granulatum |
 Penium interruptum |
 Penium jenneri |
 Penium jenneri |
 Penium libellula |
 Penium libellula |
 Penium libellula var intermedium |
 Penium libellula var. interruptum |
 Penium margaritaceum |
 Penium margaritaceum |
 Penium minutissimum |
 Penium minutum |
 Penium mooreanum |
 Penium mooreanum |
 Penium naegelii |
 Penium navicula |
 Penium navicula |
 Penium navicula var. crassum |
 Penium navicula var. inflatum |
 Penium oblongum |
 Penium phymatosporum |
 Penium polymorphum |
 Penium refescens |
 Penium spinospermum |
 Penium suboctangulare |
 Penium subtile |
 Penium truncatum |
 Penstemon barbartus |
 Penstemon barbatus |
 Penstemon barbatus |
 Penstemon barbatus |
 Penstemon barbatus |
 Penstemon bridgesii |
 Penstemon bridgesii |
 Penstemon bridgesii |
 Penstemon bridgesii |
 Penstemon campanulatus |
 Penstemon campanulatus |
 Penstemon confertus |
 Penstemon corfertus |
 Penstemon digitalis |
 Penstemon digitalis |
 Penstemon digitalis |
 Penstemon fruticosus |
 Penstemon gracilis |
 Penstemon gracilis |
 Penstemon gracilis |
 Penstemon gracilis |
 Penstemon gracilis |
 Penstemon gracilus |
 Penstemon hirsutus |
 Penstemon hirsutus |
 Penstemon hirsutus (pubescens) |
 Penstemon hirsutus (pubescens) |
 Penstemon hirsutus (pubescens) |
 Penstemon palmeri |
 Penstemon pinifolius |
 Penstemon pinifolius |
 Penstemon pinifolius |
 Penstemon pinifolius |