Listera caurina

Piper

Erythea 6: 32. 1898.

Common names: Northwest twayblade
Endemic
Synonyms: Listera retusa Suksdorf Neottia caurina (Piper) Szlachetko Ophrys caurina (Piper) Rydberg
Treatment appears in FNA Volume 26. Treatment on page 591. Mentioned on page 587.
Revision as of 21:12, 5 November 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Plants 5–30 cm. Stems green, succulent, glabrous. Leaves: blade green, ovate to elliptic, 2.5–7 × 1.8–4.5 cm, apex rounded to obtuse or subacute. Inflorescences 5–30-flowered, lax, 50–130 mm; floral bracts rhombic-ovate to lanceolate, apex acute to acuminate, glabrous to slightly glandular; peduncle and rachis glandular-pubescent. Flowers yellowish green, small; pedicel filiform, 4–12 mm, glandular-puberulent; sepals and petals distinct and free, spreading, only slightly reflexed; dorsal sepal linear-lanceolate to lanceolate, 2.8–4 × 0.5–0.8 mm, apex acute to acuminate; lateral sepals linear-lanceolate to lanceolate, falcate, 2.8–4 × 0.5–0.8 mm, apex acute to acuminate; petals linear to linear-lanceolate, slightly falcate, 2.8–3.5 × 0.5–0.8 mm, apex acute to acuminate; lip sessile, cuneate to obovate, 4.5–6 × 2–4.5 mm, apex rounded to retuse, apiculate, apical margin slightly erose or crenulate; disc with pair of dark green stripes, each swollen at base and with small horn 1 mm from top of each swelling; column short, 1.5–2 × 1 mm. Capsules semierect, ovoid to subglobose, 5 × 4 mm, glabrous. 2n = 34.


Phenology: Flowering late Apr–Sep.
Habitat: Dry litter of mixed and coniferous forests, dense moist, coniferous forests, and on boggy wooded slopes, also damp to wet conditions on moss-covered rocks or in mossy soil
Elevation: 100–2200 m

Distribution

V26 1206-distribution-map.jpg

Alta., B.C., Alaska, Calif., Idaho, Mont., Oreg., Wash.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Listera caurina"
Lawrence K. Magrath +  and Ronald A. Coleman +
Northwest twayblade +
Alta. +, B.C. +, Alaska +, Calif. +, Idaho +, Mont. +, Oreg. +  and Wash. +
100–2200 m +
Dry litter of mixed and coniferous forests, dense moist, coniferous forests, and on boggy wooded slopes, also damp to wet conditions on moss-covered rocks or in mossy soil +
Flowering late Apr–Sep. +
Listera retusa +, Neottia caurina +  and Ophrys caurina +
Listera caurina +
species +