Western Illinois University, ​R. M. Myers Herbarium (MWI)

The R.M. Myers Herbarium contains more than 75,000 specimens, of which most are from western Illinois or southeastern Iowa. We hold a major collection of moss specimens from western Illinois, as well as a set of Opuntia fragilis specimens that document most areas where it grows in the midwest.

Contacts: Ranessa Cooper, RL-Cooper@wiu.edu
Collection Type: Preserved Specimens
Management: Live Data managed directly within data portal
Global Unique Identifier: 5f887025-5ee0-453e-b25b-360c1f5e870a
Digital Metadata: EML File
Usage Rights: CC BY (Attribution)
Rights Holder: Western Illinois University
Collection Statistics
  • 42,498 specimen records
  • 4,037 (9%) georeferenced
  • 42,226 (99%) identified to species
  • 300 families
  • 2,002 genera
  • 6,234 species
  • 7,151 total taxa (including subsp. and var.)
Extra Statistics
Taxon Distribution
Taxon Distribution
  • Acamptopappus (1)
  • Achillea (76)
  • Achyrachaena (1)
  • Achyrophorus (1)
  • Adenocaulon (1)
  • Adenostemma (1)
  • Ageratina (80)
  • Ageratum (2)
  • Agoseris (17)
  • Almutaster (1)
  • Amblyolepis (1)
  • Ambrosia (125)
  • Amphiachyris (2)
  • Anaphalis (7)
  • Anisocoma (1)
  • Antennaria (98)
  • Anthemis (44)
  • Antheropeas (2)
  • Aphanostephus (2)
  • Arctium (31)
  • Arnica (10)
  • Arnoglossum (30)
  • Arnoseris (1)
  • Artemisia (86)
  • Aster (13)
  • Atrichoseris (1)
  • Baccharis (14)
  • Baileya (2)
  • Balduina (1)
  • Balsamorhiza (3)
  • Bebbia (1)
  • Berlandiera (1)
  • Bidens (279)
  • Blepharipappus (1)
  • Boltonia (16)
  • Borrichia (5)
  • Brickellia (34)
  • Brickelliastrum (1)
  • Buphthalmum (1)
  • Calycadenia (2)
  • Calycocorsus (1)
  • Calycoseris (1)
  • Calyptocarpus (3)
  • Canadanthus (1)
  • Carduus (26)
  • Carlina (1)
  • Carpesium (1)
  • Carphephorus (3)
  • Carthamus (2)
  • Centaurea (53)
  • Centratherum (1)
  • Chaenactis (6)
  • Chaetopappa (2)
  • Chaptalia (1)
  • Chondrilla (5)
  • Chromolaena (4)
  • Chrysanthemum (1)
  • Chrysopsis (3)
  • Chrysothamnus (8)
  • Chuquiraga (1)
  • Cichorium (27)
  • Cirsium (128)
  • Clibadium (3)
  • Conoclinium (14)
  • Conyza (58)
  • Coreopsis (73)
  • Cosmos (4)
  • Cotula (1)
  • Crepis (27)
  • Cyanthillium (5)
  • Dimeresia (1)
  • Doellingeria (5)
  • Doronicum (2)
  • Dracopis (1)
  • Dyssodia (8)
  • Eatonella (1)
  • Echinacea (54)
  • Echinops (2)
  • Eclipta (31)
  • Elephantopus (13)
  • Emilia (6)
  • Encelia (1)
  • Enceliopsis (1)
  • Engelmannia (1)
  • Erechtites (26)
  • Ericameria (13)
  • Erigeron (276)
  • Eriophyllum (4)
  • Eucephalus (4)
  • Eupatorium (205)
  • Eurybia (13)
  • Euthamia (25)
  • Evax (3)
  • Filago (2)
  • Flaveria (1)
  • Fleischmannia (5)
  • Gaillardia (9)
  • Galinsoga (27)
  • Gamochaeta (7)
  • Garberia (1)
  • Geraea (1)
  • Glyptopleura (1)
  • Gnaphalium (6)
  • Grindelia (24)
  • Guizotia (1)
  • Gutierrezia (6)
  • Gynura (1)
  • Hasteola (2)
  • Hedypnois (1)
  • Helenium (55)
  • Helianthella (8)
  • Helianthemum (15)
  • Helianthus (302)
  • Helichrysum (1)
  • Heliomeris (3)
  • Heliopsis (50)
  • Hemizonia (1)
  • Hesperevax (1)
  • Heterotheca (34)
  • Hieracium (82)
  • Hymenoclea (2)
  • Hymenopappus (8)
  • Hymenoxys (5)
  • Hypochaeris (9)
  • Inula (7)
  • Ionactis (7)
  • Isocoma (1)
  • Iva (25)
  • Jurinea (2)
  • Koanophyllon (1)
  • Krigia (37)
  • Lactuca (157)
  • Laennecia (2)
  • Lagascea (1)
  • Lagophylla (1)
  • Lapsana (4)
  • Lasthenia (3)
  • Layia (7)
  • Leontodon (8)
  • Lessingia (2)
  • Leucanthemella (1)
  • Leucanthemum (33)
  • Liatris (63)
  • Lindheimera (2)
  • Logfia (3)
  • Lygodesmia (3)
  • Machaeranthera (7)
  • Madia (9)
  • Malacothrix (2)
  • Mantisalca (1)
  • Marshallia (3)
  • Matricaria (30)
  • Melampodium (1)
  • Melanthera (2)
  • Microseris (9)
  • Mikania (9)
  • Monolopia (1)
  • Mycelis (2)
  • Nothocalais (1)
  • Oclemena (1)
  • Oligoneuron (29)
  • Omalotheca (1)
  • Onopordum (1)
  • Oonopsis (1)
  • Packera (92)
  • Palafoxia (4)
  • Parthenium (19)
  • Pectis (2)
  • Perityle (1)
  • Petradoria (1)
  • Peucephyllum (1)
  • Picradeniopsis (1)
  • Picris (3)
  • Picrothamnus (1)
  • Pleiacanthus (1)
  • Pleurocoronis (1)
  • Pluchea (11)
  • Polymnia (14)
  • Prenanthes (39)
  • Psathyrotes (2)
  • Pseudelephantopus (2)
  • Pseudognaphalium (43)
  • Psilocarphus (1)
  • Pterocaulon (1)
  • Ptiloria (2)
  • Pulicaria (1)
  • Pyrrhopappus (18)
  • Pyrrocoma (4)
  • Ratibida (38)
  • Rayjacksonia (1)
  • Reichardia (1)
  • Rudbeckia (150)
  • Santolina (2)
  • Sanvitalia (1)
  • Schkuhria (1)
  • Scorzonera (2)
  • Senecio (41)
  • Sericocarpus (2)
  • Serinia (3)
  • Serratula (2)
  • Silphium (109)
  • Simsia (1)
  • Smallanthus (3)
  • Solidago (379)
  • Soliva (1)
  • Sonchus (60)
  • Sphagneticola (7)
  • Spilanthes (1)
  • Stenotus (3)
  • Struchium (1)
  • Symphyotrichum (522)
  • Synedrella (1)
  • Tagetes (1)
  • Tanacetum (14)
  • Taraxacum (52)
  • Telekia (1)
  • Tetradymia (10)
  • Tetraneuris (2)
  • Thelesperma (1)
  • Tithonia (1)
  • Tolpis (1)
  • Townsendia (6)
  • Tragopogon (63)
  • Tridax (1)
  • Tripleurospermum (2)
  • Tripolium (1)
  • Trixis (1)
  • Tussilago (2)
  • Urospermum (1)
  • Verbesina (46)
  • Vernonia (85)
  • Wedelia (1)
  • Wyethia (3)
  • Xanthium (41)
  • Xeranthemum (1)
  • Xylorhiza (1)
  • Youngia (7)
  • Zinnia (2)