| Documentation |
State |
Type |
| Arizona Department of Agriculture. 2011. Protected native plants by categories. Arizona Department of Agriculture. |
|
Literature |
| Benson, L. 1982. The cacti of the United States and Canada. Stanford University Press, Stanford. |
NM |
Literature |
| Hogan, Tim. Personal communication. |
CO |
Literature |
| Johnston, B. 1991. List of Colorado plants. Unpublished. |
CO |
Literature |
| Kartesz, J.T. 1988. A flora of Nevada. University of Nevada, Reno. |
NV |
Literature |
| Kartesz, J.T. 2001. Atlas of the Nevada flora. Unpublished. |
NV |
Literature |
| Kartesz, J.T. 2002. Atlas of the Arizona flora. Unpublished. |
AZ |
Literature |
| Kearney, T., and R.H. Peebles. 1960. Arizona flora with supplement. University of California Press, Los Angeles. |
AZ |
Literature |
| Martin, W.C., and C.R. Hutchins. 1980. A flora of New Mexico. Strauss & Cramer, Germany. |
NM |
Literature |
| NMC. Specimen at New Mexico State University, Las Cruces, New Mexico. |
NM |
Specimen |
| Nevada Natural Heritage Program. 2001. Christmas trees, cacti, and yucca native to Nevada (20 October 2002). Department of Conservation and Natural Resources, Nevada. |
|
Literature |
| Nevada Natural Heritage Program. 2001. State of Nevada list of fully protected plant species (20 October 2002). Department of Conservation and Natural Resources, Nevada. |
|
Literature |
| Shultz, Leila M. Personal communication. |
UT |
Literature |
| UNM. Specimen at University of New Mexico, Albuquerque, New Mexico. |
NM |
Specimen |
| Welsh, S.L., N.D. Atwood, L.C. Higgins, and S. Goodrich. 1987. A Utah flora. Great Basin Naturalist Memoirs No. 9. Brigham Young University Press, Provo. |
UT |
Literature |
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