|
|
|
|
|
|
|
|
|
|
|
| Listera cordata (L.) R. Br. ex Ait. f. | Species Image Gallery (opens in a new window) |
||||||||
| 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 | ||||||||
| Associated Species: | damp, mossy woods and openings | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Vulnerable |
||||||||
| Nature Conservancy Status: | G5 S2 |
||||||||
| Saskatchewan
Species at Risk Status: |
None |
||||||||
| COSEWIC Status: | None |
||||||||
| Listera cordata 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: | succulent, green to reddish-purple, glabrous | ||||||||
| Leaves: | usually below the middle of the stem, 1 – 4 cm long, ovate to reniform, base cordate or deltate, apex mucronate | ||||||||
| Inflorescence: | raceme 2 – 10 cm long, 5 – 25-flowered, dense to lax; floral bracts ovate; peduncle and rachis glandular-pubescent to glabrous; pedicels 2 – 3 mm long, slender | ||||||||
| Flowers: | calyx and corolla 2 – 3 mm long, yellowish-green, green, or purplish-green; dorsal sepal ovate to elliptic, lateral sepals slightly falcate; corolla elliptic to linear; labellum 4 – 5 mm long, linear, cleft to about halfway to the base; column to 0.5 mm long | ||||||||
| Fruits: | capsule erect, globose | ||||||||
| |||||||||
