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Listera convallarioides (Broadleaf twayblade)
McAdoo, David R.

Listera convallarioides

Listera convallarioides (Sw.) Nutt. ex Elliott

Broadleaf Twayblade, Broadlipped Twayblade

Orchidaceae (Orchid Family)

Synonym(s): Ophrys convallarioides

USDA Symbol: LICO5

USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)

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

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Leaf: Green

Bloom Information

Bloom Color: White , Yellow , Green , Brown
Bloom Time: Jun , Jul , Aug


USA: 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 Conditions

Water Use: High
Light Requirement: Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low


Conspicuous Flowers: yes

Additional resources

USDA: Find Listera convallarioides in USDA Plants
FNA: Find Listera convallarioides in the Flora of North America (if available)
Google: Search Google for Listera convallarioides


Record Modified: 2007-01-01
Research By: TWC Staff

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