Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Sensitive Plant Survey, Field Notes. Guadalupe Rabbitbrush Surveys: 2007. Guadalupe RD, Lincoln NF, USFS. 3 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Field Notes. Guadalupe Rabbitbrush Surveys: 2007. Guadalupe RD, Lincoln NF, USFS. 3 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Field Notes. Guadalupe Rabbitbrush Surveys. Guadalupe RD, Lincoln NF, USFS. 2 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Sensitive Plant Survey, Field Notes. Guadalupe Rabbitbrush Surveys: 2007. Guadalupe RD, Lincoln NF, USFS. 2 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Sesnitive Plant Survey, Field Notes. Guadalupe Rabbitbrush Surveys: 2007, Guadalupe RD, Lincoln NF, USFS 3 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Inventory Completion Report, Field Notes. Guadalupe Rabbitbrush surveys: 2007. Guadalupe RD, Lincoln NF, USFS. 3 p.

• Ericameria nauseosa var. texensis
• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Sensitive Plant Site Report, Population Site Report, Field Notes. Population # PECAR-8, Guadalupe RD, Lincoln NF, USFS. 3 p.

• Penstemon cardinalis ssp. Regalis

Worthington, R.D. (2007) Lincoln National Forest, Sensitive Plant Site Report, Population Site Report, Population # PECAR-6, Guadalupe RD, Lincoln NF, USFS. 3 p.

• Penstemon cardinalis ssp. Regalis

Baker, M. Rouston, C. (2005) Lincoln National Forest, Inventory Completion Report, Field Notes. Botanical Survey- Rare Plants in the Last Chance/Sitting Bull Falls Area, part 1: Sitting Bull Canyon. Guadalupe RD, Lincoln NF, USFS. 3 p.

• Aquilegia chrysantha var. chaplinei
• Penstemon cardinalis ssp. Regalis
• Streptanthus sparsiflorus

Tonne, P. 2003. Results of rare plant surveys on Carlsbad Caverns National Park. Natural Heritage New Mexico, Museum of Southwestern Biology, Department of Biology, University of New Mexico. NHNM Publication No. 03-GTR-313.