New Mexico Herbaria
- University of New Mexico Herbarium, Albuquerque (UNM)
- New Mexico State University Range Science Herbarium, Las Cruces (NMCR)
- New Mexico State University Biology Department Herbarium, Las Cruces (NMC)
Regional Herbaria
Arizona
- Arizona State University Herbarium, Tempe (ASU)
- Deaver Herbarium, Flagstaff (ASC)
- University of Arizona Herbarium, Tucson (ARIZ)
Colorado
Texas
- Botanical Research Institute of Texas, Fort Worth (BRIT)
- UTEP Biodiversity Collections, El Paso (UTEP)
- Plant Resources Center, Austin (TEX)
Utah
- Intermountain Herbarium, Logan (USU)
- S.L. Welsh Vascular Plant Herbarium, Provo (BYU)
- Utah Valley University Herbarium, Orem, UT
Wyoming
Regional Biodiversity Databases
- Intermountain Region Herbarium Network
- New Mexico Biodiversity Collections Consortium
- Southwest Environmental Information Network (SEINet)
Regional Native Plant Societies
- Arizona Native Plant Society
- California Native Plant Society
- Colorado Native Plant Society
- Native Plant Society of New Mexico
- Native Plant Society of Texas
- Utah Native Plant Society
- Wyoming Native Plant Society
Field Guides
- Arizona Rare Plant Field Guide
- California Native Plant Society Rare Plant Program
- Colorado Rare Plant Field Guide
- Utah Rare Plant Guide
Other Rare Plant Resources
- Center for Plant Conservation Best Plant Conservation Practices to Support Species Survival in the Wild.
- Center for Plant Conservation Rare Plant Academy
- Navajo Natural Heritage Program
- New Mexico Natural Heritage Data Base
- New Mexico Endangered Plant Program
- USFWS: New Mexico Ecological Services Field Office