**Code**: [ARIZ](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=126588) **Organization**: University of Arizona **Department**: School of Plant Sciences **Location**: Tucson, Arizona, U.S.A. **Total number of specimens**: 500000 **Current status**: Active **Date founded**: 1891 **Geographic coverage**: Southwestern U.S.; northern Mexico. **Incorporated herbaria**: Part of TUC (algae of northern Gulf of California, especially E. Yale Dawson's collections) **Important collectors**: G. B. Cummins, R. S. Felger, H. S. Gentry, L. N. Goodding, H. C. Greene, T. H. Kearney, P. D. Keener, C. T. Mason, S. P. McLaughlin, R. H. Peebles, W. S. Phillips, C. G. Reeder, J. R. Reeder, F. Shreve, J. J. Thornber, R. M. Turner, T. R. Van Devender **Notes**: Updated Jan 2017 (staff update). **Date modified in Index Herbariorum**: 2018-02-06 > [!cite] This page is automatically generated • Data on this page were obtained from [Index Herbariorum](https://sweetgum.nybg.org/science/ih/) on 2023-08-23. • Meaning of acronyms in TL-2 is not always the same as in IH. Consult list of original [[Abbreviations|abbreviations]] if you suspect acronym mismatch.