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| Listera cordata (L.) R. Br. ex Ait. f. | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||
| Family: | Orchidaceae | ||||||||
| Genus: | Listera | ||||||||
| Species Synonyms: | none | ||||||||
| Common Names: | heartleaf twayblade | ||||||||
| DISTRIBUTION | |||||||||
| Canada: | Yukon – southwestern Mackenzie District – British Columbia – Alberta – Saskatchewan – Manitoba – Ontario – Quebec – Newfoundland – Nova Scotia | ||||||||
| Saskatchewan: | widespread; Lake Athabasca – Duck Mountain | ||||||||
| Ecoregion: | Boreal Transition, Mid-Boreal Upland, Athabasca Plain, Churchill River Upland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | wet, mossy spruce woods | ||||||||
| Canada: | damp, mossy woods and openings | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Vulnerable |
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| Nature Conservancy Status: | G5 S2 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Heartleaf twayblade is listed as vulnerable but is apparently secure in Saskatchewan. Most local populations are small. No immediate threats are known but are possible in the future. | |||||||||
| SPECIES DESCRIPTION | |||||||||
| Height: | 5 – 30 cm | ||||||||
| Roots: | fibrous | ||||||||
| Stems: | fleshy, green to reddish-purple, hairless | ||||||||
| Leaves: | usually below the middle of the stem, 1 – 4 cm long, ovate to kidney-shaped, base heart-shaped or square, tip with an abrupt point | ||||||||
| Inflorescence: | unbranched, 2 – 10 cm long, 5 – 25-flowered, dense to lax; floral bracts ovate; inflorescence stalk and central axis glandular-hairy to hairless; flower stalks 2 – 3 mm long, slender | ||||||||
| Flowers: | sepals and petals 2 – 3 mm long, yellowish-green, green, or purplish-green; dorsal sepal ovate to elliptic, lateral sepals slightly sickle-shaped; petals elliptic to linear; lip 4 – 5 mm long, linear, cleft to about halfway to the base; column to 0.5 mm long | ||||||||
| Fruits: | capsule erect, round | ||||||||
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