Penstemon subglaber Rydberg

are host of

• Global Biotic Interactions: Xylocopa tabaniformis Smith 1854
• Global Biotic Interactions: Ashmeadiella cactorum (Cockerell 1897)
• Global Biotic Interactions: Ceratina neomexicana Cockerell 1901
• Global Biotic Interactions: Puccinia palmeri (H. W. Anderson) Dietel & Holw. 1899
• Global Biotic Interactions: Lasioglossum nevadense (Crawford 1907)

have flowers visited by

• Global Biotic Interactions: Archilochus alexandri (Bourcier & Mulsant 1846) (mustakurkkukolibri)