Cypripedium acaule Aiton

Pink lady's slipper (en), Cypripède acaule (fr)

Species

Angiosperms > Asparagales > Orchidaceae > Cypripedium

Characteristics

Plants erect, 15–61 cm; stems leafless scapes. Leaves 2, radical, arising directly from rhizome, ascending to spreading; blade broadly elliptic to oblong-, ovate-, or obovate-elliptic, 9–30 × 2.5–15 cm. Flowers solitary; sepals reddish brown to green; dorsal sepal lanceolate to lance-ovate or elliptic, 19–52 × 5–22 mm; lateral sepals connate, synsepal 17–49 × 6–25 mm; petals deflexed to somewhat spreading, somewhat spirally twisted, same color as sepals, linear-to ovate-lanceolate, 24–60 × 4–17 mm; lip magenta to white, obovoid to oblance-ovoid, 30–67 mm, orifice a longitudinal fissure, length of lip; staminode quadrangular to suborbicular-rhomboid or ovoid-deltoid. 2n = 20.
More
Lvs 2, basal, subopposite, narrowly elliptic, 1–2 dm, thinly hairy, pale beneath; scape 2–4 dm, hairy, with a single lanceolate bract arching forward over the solitary fl; sep and lateral pet yellowish-green to greenish-brown, lanceolate, 3–5 cm, the 2 lower sep united; lip drooping, pink with red veins, 3–6 cm, hairy within, cleft along the upper side from the basal orifice to the summit, the inturned margins in contact; 2n=20. In acid soil, from swamps and bogs to dry woods and sand-dunes; Nf. and Que. to Alta., s. to N.J. and n. Ind., and along the mts. and coastal plain to S.C. and Ala. Apr.–June. (Fissipes a.)
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) -
Mature height (meter) 0.4
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Usually found in the higher and dryer parts of coniferous woods, often in a thin layer of pine needles over rocks, it is also sometimes found in bogs and wet places.
Light 4-6
Soil humidity 5-7
Soil texture 1-6
Soil acidity 1-6
Soil nutriment -
Hardiness (USDA) 5-8

Usage

Uses medicinal
Edible -
Therapeutic use Dermatological Aid (leaf), Gynecological Aid (root), Venereal Aid (root), Gastrointestinal Aid (root), Kidney Aid (root), Pediatric Aid (root), Urinary Aid (root), Analgesic (root), Anthelmintic (root), Anticonvulsive (root), Cold Remedy (root), Misc. Disease Remedy (root), Sedative (root), Love Medicine (root), Panacea (root), Gastrointestinal Aid (unspecified), Gynecological Aid (unspecified), Kidney Aid (unspecified), Analgesic (unspecified), Sedative (unspecified), Tonic (unspecified), Nervine (unspecified), Stimulant (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions or seedlings.
Mode divisions seedlings
Germination duration (days) 30 - 365
Germination temperacture (C°) 18 - 21
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Cypripedium acaule habit picture by Yves SPM (cc-by-sa)

Leaf

Cypripedium acaule leaf picture by Caleb Beaver (cc-by-sa)
Cypripedium acaule leaf picture by Alan Hicking (cc-by-sa)
Cypripedium acaule leaf picture by Claudia lavigne (cc-by-sa)

Flower

Cypripedium acaule flower picture by axel jones (cc-by-sa)
Cypripedium acaule flower picture by behave coco (cc-by-sa)
Cypripedium acaule flower picture by Delynn Jessa (cc-by-sa)

Distribution

Cypripedium acaule world distribution map, present in Åland Islands, Canada, France, Micronesia (Federated States of), Georgia, Malaysia, Nicaragua, and United States of America

Conservation status

Cypripedium acaule threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:75333-2
WFO ID wfo-0000935125
COL ID 33J3M
BDTFX ID -
INPN ID 761968
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Calceolus hirsutus Cypripedium hirsutum Fissipes acaulis Cypripedium acaule f. albiflora Cypripedium acaule f. biflorum Cypripedium humile Cypripedium acaule f. acaule Cypripedium catesbianum Cypripedium acaule f. lancifolia Fissipes acaulis f. lancifolia Fissipes hirsuta f. albiflora Cypripedium vittatum var. planum Fissipes hirsuta Cypripedium acaule