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Recordset

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Patuxent Research Refuge, Maryland

Specimen Records: 5,500
Media Records: 8,296
iDigBio Last Ingested Date: 2025-04-18

PRR is the reference herbarium for plants occurring on the Patuxent Research Refuge. The refuge was established in 1936 by executive order of President Franklin D. Roosevelt and is the nation's only national wildlife refuge established to support wildlife research. It is located between Washington and Baltimore.When the refuge was established in 1936, botanist Neil Hotchkiss and other scientists surveyed the flora on the 2,650 acres which made up the Refuge. Lists of plants found on the Refuge were published in 1940 and 1947. The latter list tabulated 877 plant taxa. Voucher specimens were collected and reposited in the Refuge's herbarium. By 1980, when the refuge expanded to 4,741 acres, a total of 969 plant taxa were listed.In the early 1990's as part of the Base Re-alignment and Closure (BRAC) process, the Department of Defense transferred about 8,100 acres of land from Fort Meade to the Department of Interior, with control of the land given to the Fish and Wildlife Service. The addition of this parcel, now known as the North Tract, brought the total acreage of the Refuge to over 12,800 acres.A floral survey of the North Tract began in 2010 and a re-survey of the older parcel of the Refuge, known as the Central and South Tracts, was initiated in 2013. As of November 2020, the herbarium holds over 5,300 voucher specimens from over 1,250 taxa found on the Refuge. This includes some Maryland rare, threatened, and endangered (RTE) species and at least five species new to Maryland. Some duplicate and unique voucher specimens are held by other herbaria. With the collaboration of the Norton-Brown Herbarium at the University of Maryland, and the Mid-Atlantic Consortium the herbarium is digitizing its voucher specimens collection. Recently, the herbarium has added lichens to its collection.Please feel free to peruse the herbarium's data, but use it with caution as we are still tweaking things.For more information

Contacts

Namenone
Rolenone
Emailhbrown@mailbox.sc.edu
Namenone
Rolenone
Emailhbrown@mailbox.sc.edu
Namenone
Rolenone
Emailbotanybill@philcobill.com
Name Bill Harms
RoleConsultant
Emailbotanybill@philcobill.com
Name Helen Lowe-Metzman
Rolenone
Emailnone
Name Robert Ferraro
Rolenone
Emailnone
Name Bill Harms
RoleConsultant
Emailbotanybill@philcobill.com
Name Helen Lowe-Metzman
Rolenone
Emailnone
Name Robert Ferraro
Rolenone
Emailnone
  • Data Corrected
  • Data Use
  • Raw
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_continent_added  i5500
100
idigbio_isocountrycode_added  i5500
100
dwc_datasetid_added  i4817
87.582
dwc_parentnameusageid_added  i4817
87.582
dwc_taxonid_replaced  i4817
87.582
dwc_taxonomicstatus_added  i4817
87.582
gbif_canonicalname_added  i4817
87.582
gbif_genericname_added  i4817
87.582
gbif_taxon_corrected  i4817
87.582
dwc_phylum_replaced  i4796
87.2
gbif_vernacularname_added  i4653
84.6
dwc_class_added  i4579
83.255
gbif_reference_added  i4046
73.564
dwc_multimedia_added  i3946
71.745
dwc_taxonrank_replaced  i3286
59.745
dwc_scientificnameauthorship_replaced  i3006
54.655
taxon_match_failed  i2402
43.673
dwc_originalnameusageid_added  i953
17.327
dwc_scientificnameauthorship_added  i502
9.127
dwc_specificepithet_replaced  i430
7.818
dwc_taxonremarks_replaced  i351
6.382
dwc_taxonremarks_added  i247
4.491
dwc_genus_replaced  i219
3.982
dwc_infraspecificepithet_added  i126
2.291
geopoint_low_precision  i75
1.364
geopoint_datum_missing  i59
1.073
dwc_family_replaced  i33
0.6
dwc_class_replaced  i23
0.418
dwc_order_replaced  i19
0.345
dwc_kingdom_suspect  i9
0.164
dwc_acceptednameusageid_added  i7
0.127
dwc_genus_added  i4
0.073
dwc_infraspecificepithet_replaced  i3
0.055
dwc_family_added  i2
0.036
specimen list