1. Calopogon oklahomensis D.H. Goldman
Map 455
Corms
usually 2‑branched. Flowering stems 5–20 cm long, about as long as or
slightly shorter than the leaf, with 2–7 flowers, these usually opening in
rapid succession. Perianth pale pink. Patch of club‑shaped hairs nearest
the tip of the lip pale pink, the more basal patches usually yellow. May–June.
Scattered
in the Unglaciated Plains Division and locally east in the Ozark Division to Howell County (Missouri and Kansas south to Texas and Louisiana). Mesic upland prairies.
For
further discussion of the differences between this species and C. tuberosus,
see the treatment of that species. The flowers of this species usually have a
fragrance reminiscent of citrus oil.