Cypripedium reginae


Fl. Carol., 222. 1788

Common names: Showy lady’s-slipper queen lady’s-slipper cypripède royal
Synonyms: Cypripedium spectabile Salisbury
Treatment appears in FNA Volume 26. Treatment on page 503. Mentioned on page 491, 500, 502.
Click plate for higher resolution version.
Plants erect, 21–90 cm. Leaves 3–9, along length of stem, alternate, ascending to spreading; blade broadly elliptic to ovate or elliptic-lanceolate, 10–27 × 5–16 cm. Flowers 1–3(–4); sepals white; dorsal sepal suborbiculate to ovate-orbiculate, 25–45 × 18–42 mm; lateral sepals connate, synsepal 24–42 × 15–37 mm; petals spreading, same color as sepals, oblong to elliptic or ovate-lanceolate, flat, 25–47 × 6–17 mm; lip white, usually suffused around orifice and variably beyond with pale pink to crimson magenta, subglobose-obovoid, 25–53 mm; orifice basal, 18–28 mm; staminode cordiform-ovoid to ovoid-lanceoloid. 2n = 20.

Phenology: Flowering May–Aug.
Habitat: Coniferous and hardwood fen forests, openings, fen meadows, hillside seeps, meadows, prairies, dune lags, seeping cliffs
Elevation: mostly 0–600 m


V26 1024-distribution-map.jpg

Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Ark., Conn., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., Tenn., Vt., Va., W.Va., Wis.




Lower Taxa

No lower taxa listed.