Species Orchid, Stemless Lady's Slipper, Moccasin Flower, Short Inflorescence Cypripedium

Cypripedium acaule

Family
Orchidaceae (or-kid-AY-see-ee)
Genus
Cypripedium (sip-rih-PEE-dee-um)
Species
acaule (a-KAW-lee)
Synonym
Calceolus hirsutus
Cypripedium hirsutum
Cypripedium humile
Fissipes acaulis
Fissipes hirsuta
Sun Exposure
Light Shade
Partial to Full Shade
Foliage
Herbaceous
Velvet/Fuzzy
Height
6-12 in. (15-30 cm)
Spacing
9-12 in. (22-30 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
Danger
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Pink
Chartreuse (yellow-green)
Brown/Bronze
White/Near White
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
4.5 or below (very acidic)
4.6 to 5.0 (highly acidic)
5.1 to 5.5 (strongly acidic)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Old Lyme, Connecticut

Cornelia, Georgia

Lula, Georgia

Bardstown, Kentucky

Naples, Maine

Valley Lee, Maryland

Bolton, Massachusetts

Bridgewater, Massachusetts

Dudley, Massachusetts

Haydenville, Massachusetts

Mattapoisett, Massachusetts

Millbury, Massachusetts

New Salem, Massachusetts

Northfield, Massachusetts

Sterling, Massachusetts

Wayland, Massachusetts

Wellesley Hills, Massachusetts

Bay City, Michigan

Cadillac, Michigan

Saint Helen, Michigan

West Branch, Michigan

Saint Paul, Minnesota

Egg Harbor Township, New Jersey

Hannibal, New York

Elizabeth City, North Carolina

Hendersonville, North Carolina

Morganton, North Carolina

Tidioute, Pennsylvania

Wilkes Barre, Pennsylvania

Hope Valley, Rhode Island

Rhoadesville, Virginia

Roanoke, Virginia

Menomonie, Wisconsin

show all

Featured Videos

Gardener's Notes:

10
positives
3
neutrals
0
negative
Sort By:
Sort By:
C
ROSLINDALE, MA | April 2016 | neutral

A very beautiful ladyslipper that rarely survives more than a few years in the garden. It is one of the most difficult species to transpl...Read More

M
M
Sterling, MA | May 2013 | positive

An wonderful plant! They seem to be very scattered in the wild and I've heard they can be very picky about where they grow. I had found...Read More

R
Walkerton, VA (Zone 7a) | February 2006 | positive

Like most folks I don't recommend transplanting this beautiful wildflower except under special circumstances; for instance, when the deve...Read More

N
N
Loves Park, IL | August 2005 | positive

I have grown native orchids and in particular Cypripedium for several years now. Acaule to me is the gem of the North. When it is happy, ...Read More

G
Bridgewater, MA (Zone 6b) | June 2005 | positive

A beautiful terrestrial orchid native to the eastern part of the US. These grow in shady pine forests in small clumps and can be seen fl...Read More

D
Menomonie, WI (Zone 4a) | May 2005 | positive

I grow it with my pitcher plants (Sarracenia) and it seems to love the wet peaty soil. It has spread each year.

S
Hope Valley, RI (Zone 6b) | July 2004 | positive

I have been blessed with these beautys growing native on my small lot. I have set aside the area they like as a "no garden zone". 2004 ...Read More

N
Wells Bridge, NY | June 2004 | positive

I live in upstate Ny and recently noted some new additions to my garden. I did not know what they were and so took some photos to ask oth...Read More

T
St. John's, NL (Zone 5b) | March 2004 | positive

This is the very RARE form of the pink lady's-slipper. I found this plant growing among a patch of typical pink ones growing in Pippy Pa...Read More

S
Wayland, MA | June 2003 | positive

It's a stunningly beautiful native plant in New England.
However, I've lost some due to a black leaf condition, mold or mildew, an...Read More

S
Oklahoma City, OK (Zone 7a) | August 2002 | neutral

This plant prefers dry, acidic woods, typically on slopes or steep hillsides, and in sphagnum bogs.

D
D
(Zone 5b) | July 2002 | positive

Showy bloom but often hidden in the woodland shade. Please do not dig from the wild. Mine was nursery propagated and does well in my shade garden.

T
T
Murfreesboro, TN (Zone 7a) | April 2002 | neutral

Has a reputation for being difficult to grow; however one site suggests using only soft water (add a couple tablespoons of vinegar) when ...Read More

Featured
Photinia Species
(Photinia x fraseri)
Whitebanded Crab Spider
(Misumenoides formosipes)
Ruby-crowned Kinglet
(Regulus calendula)
Featured
Photinia Species
(Photinia x fraseri)
Whitebanded Crab Spider
(Misumenoides formosipes)
Ruby-crowned Kinglet
(Regulus calendula)