Contains 5 accepted taxa overall.

Characteristics
Calopogon R.Br.
GRASSPINK
Classification
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ASPARAGALES
Calopogon
Citation
CALOPOGON R. Brown, in W. T. Aiton, Hortus Kew. 5: 204. 1813, nom. cons.
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TYPE: Calopogon pulchellus R. Brown, nom. illegit. (Limodorum tuberosus Linnaeus; Calopogon tuberosus (Linnaeus) Britton et al.)
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Calopogon barbatus Bearded Grass-pink
Calopogon multiflorus Many-flowered Grass-pink
Calopogon oklahomensis Oklahoma Grass-pink
Calopogon pallidus Pale Grass-pink
Calopogon tuberosus var. tuberosus Common Grass-pink
Identification Key
1.  (Flower consisting of 2 lateral ascending sepals and 1 downward-pointing sepal, 2 lateral descending petals and 1 erect lip with numerous bristles mimicking anthers, the column downward-pointing over the sepal) Corm usually forked; inflorescence rachis and ovary purple; flowers never white, strongly fragrant, opening nearly simultaneously; 2 lateral petals obovate, widest above the middle; flowering late Feb-early Jul (esp. Mar-May)
1.  Corm usually not forked; inflorescence rachis and ovary green to purple; flowers sometimes white, scentless to mildly fragrant, opening sequentially or nearly simultaneously; 2 lateral petals widest near or below the middle; flowering in various months
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2.  Upper leaf tightly appressed to somewhat ascending; flowers never white, crowded on the rachis, <1 cm apart, opening nearly simultaneously, not fragrant; flowering Dec-early May (esp. Mar-Apr)
2.  Upper leaf ascending to divergent; flowers sometimes white, well-spaced along the rachis, >1 cm apart, opening sequentially, mildly fragrant; flowering in various months
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3.  Floral bracts 1.5-4.5 mm long; lateral sepals 10-15 mm long, often strongly falcate and curved upwards; lateral petals 9-18 mm long, lanceolate to weakly pandurate, falcate; lip 9-13 mm long, 5-11 mm wide, middle lobe often broadly flared and wing-like (sometimes knobby); flowering late Mar-late Jul (esp. Apr-May)
3.  Floral bracts 3-30 mm long; lateral sepals 13-26 mm long, spreading to slightly falcate and curved upwards; lateral petals 13-28 mm long, obpandurate, slightly falcate to straight; lip 11-23 mm long, 5.5-21 mm wide, middle lobe often abruptly flared and knobby at the apex with a narrow claw; flowering in various months
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4.  Leaf blade strongly curled transversely; dilated distal portion of middle lip lobe narrowly to widely expanded, whitened; wet, alkaline savannas; flowering Jan-May (esp. Mar-Apr)
4.  Leaf blade slightly curled transversely; dilated distal portion of middle lip lobe broadly expanded and not whitened except in entirely white flowers; acidic wetlands; flowering Mar-early Jun (esp. Apr-May)
1.  (Hybrid taxa) (multiflorus x pallidus)
1.  (barbatus x multiflorus)
1.  (barbatus x pallidus)
1.  (barbatus x tuberosus)
1.  (pallidus x tuberosus)
1.  (multiflorus x tuberosus)
Genus Synonyms
Synonym Full Citation Basionym Type
No synonyms found.