**Code**: [MO](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=125279) **Organization**: Missouri Botanical Garden **Location**: Saint Louis, Missouri, U.S.A. **Total number of specimens**: 7000000 **Current status**: Active **Date founded**: 1859 **Taxonomic coverage**: Phanerogams; Pteridophytes; mosses **Geographic coverage**: Worldwide; Central America (especially Costa Rica, Nicaragua, and Panama), tropical South America (especially Bolivia, Colombia, Ecuador, Paraguay, Peru, and Venezuela), Africa, and Madagascar; North America, Neotropics, Asia (especially China) **Incorporated herbaria**: TRA (3000 specimens) in 1984, mosses of CM in 1981, bryophytes of DEK, bryophytes of SMS, bryophytes of PAC, <Carex> (9700) and bryophytes (702) of WARM in 1998, C. F. Reed Herbarium (160 000 vascular plants, 35 000 bryophytes) in 2001, bryophytes of LAF (30 000 specimens) in 2002, post-1970 bryophyte collections of BUF on loan in 2002, UMO (235,000) in 2015, Powell Garden Herbarium (estimated 35,000 specimens, partially accessioned), IBE (estimated 265,000 specimens, not yet accessioned) **Important collectors**: L. Abrams, J. G. Adam, B. H. Allen, P. H. Allen, E. Anderson, C. F. Austin, D. F. Austin, C. F. Baker, J. T. Baldwin, J. Ball, M. Bang, J. Banks, H. Barclay, R. D. A. Bayliss, J. J. Bernhardi, F. Blanchard, G. R. Boehmer, W. E. Broadway, S. B. Buckley, B. F. Bush, S. P. Churchill, J. R. Churchill, H. S. Conard, T. E. Croat, M. R. Crosby, G. Davidse, J. Davis, D. Demaree, R. Dressler, J. A. Drushel, J. A. Duke, H. K. D. Eggert, W. H. Emory, G. Engelmann, A. Fendler, J. C. Frémont, J. Gay, A. H. Gentry, A. L. Grant, A. Gray, J. M. Greenman, W. E. Harmon, E. Hassler, Si He, A. A. Heller, A. Henry, G. B. Hinton, A. S. Hitchcock, O. E. Jennings, G. Jermy, M. E. Jones, J. F. Joor, A. B. Katende, J. H. Kellogg, E. P. Killip, B. A. Krukoff, J. Lavranos, G. W. Letterman, D. H. Linder, F. J. Lindheimer, C. F. Ludwin, C. L. Lundell, J. Macoun, R. E. Magill, W. Meijer, Y. E. J. Mexia, F. G. Meyer, V. Mühlenbach, C. R. Orcutt, E. J. Palmer, J. Pawek, E. P. Phillips, G. Pilz, H. F. Pittier, D. M. Porter, S. F. Price, C. G. Pringle, R. A. Pursell, P. L. Redfearn, Jr., J. H. Redfield, M. Reekman, W. D. Reese, K. R. Robertson, S. A. Robertson, R. J. Rodin, H. H. Rusby, R. W. Schery, F. C. Seymour, F. W. Sieber, J. D. Smith, D. C. Solander, P. C. Standley, R. F. Steinbach, J. A. Steyermark, S. M. Tracy, W. Trelease, E. F. Tyson, D. A. P. Watt, T. O. Weigel, R. Woodson, E. O. Wooton, F. Woytkowski, C. Wright, T. G. Yuncker, G. A. Zenker, O. Zöllner **Notes**: Algae transferred to UC. Fungi transferred to BPI. Lichens transferred to US. Specimens from Traub Herbarium, transferred to MO in 1984, should be cited as TRA. MO library contains more than 200 000 volumes, about 800 current botanical periodicals and approximately 250 000 items in the archives, including letters, manuscripts, paintings, drawings, photographs, and maps. MO maintains a computerized database, TROPICOS, containing information on names and nomenclature, specimens and literature references for vascular plants and mosses worldwide, including images, synonymy, acceptance and authority files at http://www.tropicos.org. Records since 1975 from <Index to Plant Chromosome Numbers>, now published by MO, are part of database. Flora projects include: <Flora of China>, <Flora de Nicaragua> in conjunction with HNMN, <Flora of Peru> in conjunction with F, <Flora Mesoamericana> in conjunction with BM and MEXU, <Flora of the Venezuelan Guayana>, <Flora of North America>, <Catalog of the Flowering Plants and Gymnosperms of Peru>, and <Catalog of the Vascular Plants of Ecuador> and <Catálogo de las plantas vasculares de Bolivia> Address for visitors to the Garden (and deliveries that require a street address: 4344 Shaw Blvd., St. Louis, MO 63110). **Date modified in Index Herbariorum**: 2023-05-04 > [!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.