Calopogon tuberosus

Calopogon tuberosus, the tuberous grass pink, is an orchid native to eastern North America.[1]

Tuberous grass pink
Tuberous Grass-pink.jpg
Ottawa, Ontario

Secure (NatureServe)
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Arethuseae
Genus: Calopogon
C. tuberosus
Binomial name
Calopogon tuberosus
    • Bletia tuberosa (L.) Ames
    • Calopogon pulchellus Fernald
    • Calopogon pulchellus (Salisb.) R.Br.
    • Calopogon pulchellus f. albiflorus (Britton) Fernald
    • Calopogon pulchellus f. latifolius H.St.John
    • Calopogon pulchellus var. latifolius (H.St.John) Fernald
    • Calopogon pulchellus var. simpsonii (Small) Ames ex Correll
    • Calopogon tuberosus f. albiflorus Britton
    • Calopogon tuberosus var. latifolius (H.St.John) B.Boivin
    • Calopogon tuberosus f. niveus P.M.Br.
    • Cathea pulchella (Salisb.) Salisb.
    • Cathea pulchella f. albiflora (Britton) House
    • Cathea pulchella f. latifolia (Britton) House
    • Cathea pulchella f. linearifolia House
    • Cathea tuberosa (L.) Morong
    • Cymbidium pulchellum (Salisb.) Sw.
    • Helleborine tuberosa (L.) Kuntze
    • Limodorum pulchellum Salisb.
    • Limodorum simpsonii Small
    • Limodorum tuberosum L.
    • Limodorum tuberosum f. albiflorum House
    • Limodorum tuberosum f. latifolium (H.St.John) House
    • Limodorum tuberosum f. linariifolium House
    • Limodorum tuberosum var. nanum Nieuwl.


In the United States, it occurs from as far southwest as Texas and Oklahoma and southeast to the Florida Everglades to as far northeast as Maine and as far northwest as Minnesota. In Canada, it is found in all provinces from Newfoundland to Manitoba. It also is found in St. Pierre & Miquelon, Cuba and the Bahamas.[3][4][5]


  • Calopogon tuberosus var. simpsonii (Small) Magrath – southern Florida
  • Calopogon tuberosus var. tuberosus – from Texas to Florida, north to Manitoba and Nova Scotia, also Cuba and Bahamas

Conservation statusEdit

It is listed as "G5 - Secure" under the NatureServe conservation status system. However it is listed as an endangered species by the states of Illinois, Kentucky, and Maryland, and as exploitably vulnerable by New York.


  1. ^ a b Justice, William S.; Bell, C. Ritchie; Lindsey, Anne H. (2005). Wild Flowers of North Carolina (2. printing. ed.). Chapel Hill, NC: Univ. of North Carolina Press. p. 53. ISBN 0807855979.
  2. ^ "Calopogon tuberosus (L.) Britton, Sterns & Poggenb". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 8 April 2021.
  3. ^ "Calopogon tuberosus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  4. ^ Kew World Checklist of Selected Plant Families
  5. ^ USDA, NRCS (n.d.). "Calopogon tuberosus". The PLANTS Database ( Greensboro, North Carolina: National Plant Data Team.

External linksEdit