Listera convallarioides (Sw.) Nutt. ex Elliott
Broadleaf Twayblade, Broadlipped Twayblade
Orchidaceae (Orchid Family)
Synonym(s): Ophrys convallarioides
USDA Symbol: LICO5
A little plant with a pair of leaves at midstem below a slender raceme of about 20 small, green, bilaterally symmetrical flowers.
Broadleaf Twayblade also occurs in Asia. The small green flowers attract little insects. When the insect enters the flower, it trips a mechanism that fires a spot of pollen that sticks to the insect and is carried by it to another flower, thus facilitating pollination. There are three other species in the West with the characteristic pair of leaves at midstem, but none with sepals and upper petals sharply bent backward.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Complexity: Simple
Bloom InformationBloom Color: White , Yellow , Green , Brown
Bloom Time: Jun , Jul , Aug
DistributionUSA: AK , AZ , CA , CO , ID , ME , MI , MN , MT , NH , NV , NY , OR , SD , TN , UT , VT , WA , WI , WY
Canada: NB , NL , NS , PE
Native Distribution: Alaska south and east to Newfoundland, and south in West to southern California, Idaho, northeastern Nevada, northern Utah, and central Colorado; also in southern Arizona, and in northern portion of eastern United States.
Native Habitat: Moist woods.
Growing ConditionsWater Use: High
Light Requirement: Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
BenefitConspicuous Flowers: yes
Additional resourcesUSDA: Find Listera convallarioides in USDA Plants
FNA: Find Listera convallarioides in the Flora of North America (if available)
Google: Search Google for Listera convallarioides
MetadataRecord Modified: 2007-01-01
Research By: TWC Staff