Difference between revisions of "Listera ovata"
in W. Aiton and W. T. Aiton, Hortus Kew. 5: 201. 1813.
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|common_names=Common twayblade | |common_names=Common twayblade | ||
− | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Ophrys ovata | |name=Ophrys ovata | ||
|authority=Linnaeus | |authority=Linnaeus | ||
+ | |publication_title=Sp. Pl. | ||
+ | |publication_place=2: 946. 1753 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
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|publication year=1813 | |publication year=1813 | ||
|special status= | |special status= | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V26/V26_1205.xml |
|subfamily=Orchidaceae subfam. Epidendroideae | |subfamily=Orchidaceae subfam. Epidendroideae | ||
|tribe=Orchidaceae tribe Neottieae | |tribe=Orchidaceae tribe Neottieae |
Revision as of 20:30, 24 September 2019
Plants 20–60 cm. Stem green, stout, succulent, glabrous. Leaves: blade yellow-green to green, ovate-elliptic, 10–17 × 10–12 cm, apex acute. Inflorescences 10–100-flowered, lax to dense, 10–50 cm; floral bracts lanceolate, 3 × 1 mm; peduncle and rachis glandular-pubescent. Flowers yellowish green; pedicels stout, 3–4 mm, slightly glandular-pubescent; sepals and petals projecting forward, connivent, forming hood over column; dorsal sepal ovate, concave, 5–6 × 2–3 mm, apex obtuse; lateral sepals ovate, concave, falcate, 4 × 2–3 mm, apex obtuse; petals linear, concave, 4 × 1 mm, apex obtuse; lip acutely deflexed near base, sessile, linear, apical 1/2 expanded, cleft into bluntly rounded lobes separated by tooth in sinus; disc with longitudinal thickened ridge leading to deflection, 8–10 × 4 mm; column short, 2 × 1.5 mm. Capsules semierect, ellipsoid, 10 × 6 mm. 2n = 32, 34, 35, 36, 37, 38, 40, 42.
Phenology: Flowering late Jun–Jul.
Habitat: Moist rich humus, or in disturbed areas
Elevation: 700–800 m
Discussion
Listera ovata is a large, robust, aggressive, and exceedingly common orchid weed found in many kinds of habitat throughout Europe into Siberia and India. It may have the potential to become a weedy orchid in North America just as Epipactis helleborine. Listera ovata was used by Charles Darwin in his investigation and description of the method of cross-fertilization in the genus Listera.
Selected References
None.