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San Francisco State University, Harry D. Thiers Herbarium

Specimen Records: 40,701
Media Records: 39,595
iDigBio Last Ingested Date: 2026-02-24

The primary research focus of the Harry D. Thiers Herbarium is mycology. Most of the early collections were made by Harry Thiers and his students, and later by Dennis Desjardin and his students. Specialties include fleshy fungi of North America, Hawai'i, Indonesia, and southeast Asia; California lichens, bryophytes, and flowering plants, with an exceptionally large collection of Arctostaphylos. The herbarium was established in 1959 as the SFSU Herbarium, and was renamed the HDT Herbarium following Harry's retirement in 1989.

Contacts

Namenone
Rolenone
Emailded@sfsu.edu
Name Dennis Desjardin
Rolenone
Emailded@sfsu.edu
Name Dennis Desjardin
Rolenone
Emailded@sfsu.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
dwc_datasetid_added  i33516
82.347
dwc_parentnameusageid_added  i33516
82.347
dwc_taxonomicstatus_added  i33516
82.347
gbif_canonicalname_added  i33516
82.347
gbif_genericname_added  i33516
82.347
gbif_taxon_corrected  i33516
82.347
dwc_taxonid_replaced  i33515
82.344
idigbio_isocountrycode_added  i33406
82.077
dwc_continent_added  i33387
82.03
dwc_scientificnameauthorship_replaced  i32693
80.325
dwc_country_replaced  i30424
74.75
gbif_reference_added  i29541
72.581
dwc_multimedia_added  i25061
61.573
gbif_vernacularname_added  i24072
59.144
dwc_taxonrank_replaced  i22332
54.868
geopoint_datum_missing  i19825
48.709
dwc_originalnameusageid_added  i15465
37.997
taxon_match_failed  i8264
20.304
dwc_basisofrecord_invalid  i6085
14.95
dwc_basisofrecord_removed  i6085
14.95
dwc_taxonremarks_added  i5633
13.84
dwc_specificepithet_replaced  i3772
9.268
dwc_genus_replaced  i3405
8.366
dwc_phylum_replaced  i2706
6.648
dwc_family_replaced  i1920
4.717
rev_geocode_eez  i1147
2.818
dwc_order_replaced  i262
0.644
dwc_kingdom_suspect  i256
0.629
dwc_scientificnameauthorship_added  i182
0.447
geopoint_low_precision  i159
0.391
dwc_order_added  i46
0.113
dwc_country_added  i42
0.103
dwc_taxonrank_invalid  i33
0.081
dwc_taxonrank_removed  i33
0.081
dwc_class_added  i24
0.059
rev_geocode_mismatch  i19
0.047
dwc_class_replaced  i6
0.015
dwc_infraspecificepithet_added  i4
0.01
rev_geocode_corrected  i3
0.007
datecollected_bounds  i2
0.005
dwc_kingdom_added  i2
0.005
dwc_phylum_added  i2
0.005
dwc_stateprovince_replaced  i2
0.005
rev_geocode_lon_sign  i2
0.005
dwc_family_added  i1
0.002
dwc_genus_added  i1
0.002
dwc_taxonid_added  i1
0.002
dwc_taxonrank_added  i1
0.002
rev_geocode_failure  i1
0.002
rev_geocode_lat_sign  i1
0.002