Cyp. acaule photo by Lise Beausejour

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Orchid Species: Cypripedium acaule

(This name is currently accepted by Kew.)

Cypripedium acaule is an orchid species identified by Aiton in 1789.
Genus
Cypripedium (Cyp.)
Grex
acaule
(name currently accepted by Kew)
Parents
Species
Author
Aiton
Year
1789
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ORIGIN: Found in the eastern USA and Canada and south to Georgia and Alabama in hardwood and conifer forests, in swamps and bogs, dense woods along streams and in coastal dunes.

DESCRIPTION: Large sized, cold growing, erect, terrestrial plant from the higher and drier deciduous forests with 2, plicate, opposite, basal, elliptic, obtuse leaves that blooms in the spring and early summer on a terminal, slender, to 15 [45 cm] long inflorescence carrying a solitary, nodding, showy flower arising with the new leaves in the spring in the south through summer in the north.

FLOWER SIZE: 2 inches [5 cm] -- information provided by Jay Pfahl, author of the Internet Orchid Species Encyclopedia (IOSPE).
Other Names
Genus Name Genus Grex Name Year Author
Add+ Calceolus Calceolus hirsutus 1913 (Mill.) Nieuwl.
Add+ Fissipes Fissipes acaulis 1903 (Aiton) Small
Add+ Cypripedium Cyp hirsutum 1768 Mill.
Add+ Cypripedium Cyp humile 1791 Salisb.
Add+ Cypripedium Cyp catesbianum 1833 Raf.
Add+ Fissipes Fissipes hirsuta 1917 (Mill.) Farw.
Most awarded/recent cultivars: Cyp. acaule 'Lia' (1979) Cyp. acaule 'Paul' (1975)
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