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Iowa State University, Ada Hayden Herbarium

Specimen Records: 61,263
Media Records: 80,740
iDigBio Last Ingested Date: 2026-02-24

Charles Bessey, the founder of the Ada Hayden Herbarium, and his student J. C. Arthur added the earliest fungal specimens to the herbarium's holdings. L. H. Pammel and his students, including George W. Carver, continued to build the mycological collection. Irving E. Melhus was hired as Iowa State's first plant pathologist, and Joseph C. Gilman soon joined Melhus as a mycologist and plant pathologist. Lois H. Tiffany succeeded Drs. Melhus and Gilman as ISC’s mycologist. The prestigious University of Iowa Mycological Herbarium was transferred to ISC in 1984. This collection contains the specimens of George Martin, Thomas H. Macbride, and A. P. Morgan, and is rich in type specimens. Currently the mycological collection contains an estimated 56,000 packeted and boxed specimens.

Contacts

Namenone
Rolenone
Emaildlewis@iastate.edu
Name Deborah Lewis
Rolenone
Emaildlewis@iastate.edu
Name Deborah Lewis
Rolenone
Emaildlewis@iastate.edu
This table shows any data corrections that were performed on this recordset to improve the capabilities of iDigBio Search. The first column represents the correction performed. The last two columns represent the number and percentage of records that were corrected. A complete list of the data quality flags and their descriptions can be found here. Clicking on a data flag name will take you to a search for all records with this flag in this recordset.
FlagRecords With This Flag(%) Percent With This Flag
idigbio_isocountrycode_added  i53484
87.302
dwc_continent_added  i53142
86.744
dwc_datasetid_added  i51744
84.462
dwc_parentnameusageid_added  i51744
84.462
dwc_taxonomicstatus_added  i51744
84.462
gbif_canonicalname_added  i51744
84.462
gbif_genericname_added  i51744
84.462
gbif_taxon_corrected  i51744
84.462
dwc_taxonid_replaced  i51737
84.451
dwc_scientificnameauthorship_replaced  i47662
77.799
dwc_country_replaced  i46128
75.295
gbif_reference_added  i42300
69.047
geopoint_datum_missing  i35526
57.989
dwc_taxonrank_replaced  i23974
39.133
dwc_multimedia_added  i23751
38.769
dwc_originalnameusageid_added  i22381
36.533
taxon_match_failed  i17391
28.387
gbif_vernacularname_added  i17243
28.146
dwc_specificepithet_replaced  i9699
15.832
dwc_genus_replaced  i8096
13.215
dwc_taxonremarks_added  i5514
9.001
dwc_family_replaced  i5254
8.576
dwc_order_replaced  i3347
5.463
dwc_class_replaced  i2465
4.024
dwc_phylum_replaced  i2227
3.635
dwc_order_added  i2061
3.364
dwc_scientificnameauthorship_added  i1693
2.763
dwc_kingdom_suspect  i1650
2.693
dwc_class_added  i1448
2.364
dwc_basisofrecord_invalid  i608
0.992
dwc_basisofrecord_removed  i608
0.992
dwc_family_added  i425
0.694
geopoint_low_precision  i408
0.666
dwc_phylum_added  i398
0.65
dwc_kingdom_added  i397
0.648
rev_geocode_eez  i307
0.501
rev_geocode_mismatch  i104
0.17
dwc_stateprovince_replaced  i41
0.067
dwc_taxonrank_invalid  i26
0.042
dwc_taxonrank_removed  i26
0.042
dwc_kingdom_replaced  i8
0.013
dwc_specificepithet_added  i8
0.013
dwc_genus_added  i7
0.011
dwc_taxonid_added  i7
0.011
dwc_taxonrank_added  i7
0.011
datecollected_bounds  i5
0.008
rev_geocode_corrected  i2
0.003
rev_geocode_lon_sign  i2
0.003
geopoint_datum_error  i1
0.002