Penstemon breviculus

Nielsen, L. et al. 1998. Biological survey results for the Mid-America Pipeline Company/Williams Rocky Mountain Loop Project. Prepared by ENSR, Fort Collins, Colorado.

• Sclerocactus cloveriae ssp. Brackii
• Penstemon breviculus
• Gilia formosa
• Astragalus proximus
• Aliciella formosa
• AZTEC GILIA
• BRACK'S HARDWALL CACTUS
• NARROW-MOUTH PENSTEMON

Sivinski, R. 1999. Results of Field Surveys for Rare and Endangered Plants on New Mexico State Trust Lands. 12 p.

• Cryptantha oblata var. nov.
• Penstemon breviculus
• NARROW-MOUTH PENSTEMON

Sivinski, Robert. 1997. Element Observations from the State Botanist. . 17 p.

Sivinski, R. 1999. Endangered Plant Study. Sante Fe, NM: New Mexico Forestry Division; Progress and Performance Report E-9-13. 88p.

• Erigeron rhizomatus
• Penstemon breviculus