(L.) B.S.P.
Identity
Unique IDELEMENT_GLOBAL.2.130848
Element CodePMORC0C040
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
CITESAppendix II
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderOrchidales
FamilyOrchidaceae
GenusCalopogon
SynonymsCalopogon pulchellusR. Br. ex Ait. f.
Other Common NamesCalopogon tubéreux (FR) tuberous grasspink (EN)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-07-02
Change Date1990-09-18
Edition Date2025-07-02
Edition AuthorsOgle, Y. (1987), rev. N. Ventrella (2025)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsCalopogon tuberosus is an orchid occurring in grasslands, savannas, meadows, fens, bogs, and interdune swales on acidic and alkaline soils of eastern North America, from Newfoundland and Manitoba, Canada, south to Florida, and Texas in the United States, as well as Cuba and the Bahamas. There are over 1,000 estimated occurrences of this species, which are threatened by succession, invasive species, deer browse, livestock grazing, off-road vehicles, logging, peat mining, sea level rise and saltwater intrusion (in some coastal regions), herbicides, collection from the wild for horticultural purposes, and other threats in some places. Little is known about trends, but with a large range extent and high number of occurrences Calopogon tuberosus is considered secure.
Range Extent CommentsCalopogon tuberosus occurs in eastern North America, from Newfoundland and Manitoba, Canada, south to Florida and Texas in the United States, as well as Cuba and the Bahamas (FNA 2002). Range extent was estimated to be over 7 million square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1994 and 2025 (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025). See individual entries for distribution details about the two varieties.
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025, it is estimated that there are over 1,000 occurrences rangewide (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025).
Threat Impact CommentsAlthough threats are not widely documented, Calopogon tuberosus is primarily threatened by succession and overshading of habitat by woody species, with additional threats from invasive species, deer browse, livestock grazing, off-road vehicles, logging, peat mining, sea level rise and salt water intrusion (in some coastal regions), herbicides, collection from the wild for horticultural purposes, and other threats in some places (NatureServe 2025).