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Echinocactus polycephalus Engelm. & J.M. Bigelow var. polycephalus
cottontop cactus
Data Source
Last revised by:
John T. Kartesz, Biota of North America Program |
Curated and maintained by:
USDA NRCS National Plant Data Team
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Data Documentation
| Documentation |
State |
Type |
| 2000. CalFlora: Information on California plants for education, research and conservation. The CalFlora Database, Berkeley. |
CA |
Literature |
| Arizona Department of Agriculture. 2011. Protected native plants by categories. Arizona Department of Agriculture. |
|
Literature |
| Checklist of the vascular plants of San Diego County, California. San Diego Natural History Museum, San Diego. |
CA |
Literature |
| Cronquist, A., A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren. 1972. Intermountain flora: Vascular plants of the Intermountain West. New York Botanical Garden, New York. |
UT |
Literature |
| Hickman, J.C. (ed.). 1993. The Jepson manual. University of California Press, Berkeley. |
CA |
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 Unpublished.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 Unpublished.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 |
| 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. |
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Literature |
| Specimen Management System for California Herbaria (SMASCH). |
CA |
Literature |
| Stein, B.A., and S.F. Warrick (eds.). 1979. Granite Mountains resource survey. Environmental Field Program Publication No. 1. University of California, Santa Cruz. |
CA |
Literature |
| 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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