Listera smallii

Wiegand

Bull. Torrey Bot. Club 26: 169. 1899.

Common names: Appalachian twayblade kidney-leaf twayblade
Endemic
Basionym: Listera reniformis Small Bull. Torrey Bot. Club 24: 334. 1897,
Synonyms: Bifolium smallii (Wiegand) Nieuwland Neottia smallii (Wiegand) Szlachetko Ophrys smallii (Wiegand) House
Treatment appears in FNA Volume 26. Treatment on page 591. Mentioned on page 587.

Plants 5–35 cm. Stems slender, succulent, glabrous. Leaves: blade dark green, ovate-reniform, 2–4 × 1.5–3.5 cm, apex acute, mucronate, or apiculate to short-acuminate. Inflorescences 5–15-flowered, lax, 40–100 mm; floral bracts ovate, 3–4 × 1.5 mm, apex acute; peduncle and rachis glandular-pubescent. Flowers green, purple-brown, to pinkish tan; pedicel slender, 6–7 mm, glabrous; sepals strongly reflexed; dorsal sepal lanceolate to linear-lanceolate, 3–4 × 1 mm, apex acute; lateral sepals lanceolate to linear-lanceolate, 3–4 × 1 mm, apex acute; petals slightly reflexed, linear to linear-lanceolate, margins slightly revolute, apex acute; lip sessile, broadly obovate to cuneate, 6–10 × 5–7 mm, base with rounded lobule on each side, apex dilated and deeply cleft into pair of ± divergent broadly rounded lobes, shallowly toothed in sinus; column slightly arcuate, short, 1.5–3 × 1–2 mm. Capsules semierect, ellipsoid, 5 × 3 mm. 2n = 38.


Phenology: Flowering Jun–Jul.
Habitat: Damp humus in shady forests of Appalachian Mountains, often beneath Rhododendron in acidic soil, also in sphagnous thickets and bogs
Elevation: 600–1300 m

Distribution

V26 1207-distribution-map.jpg

Ga., Ky., Md., N.J., N.C., Pa., S.C., Tenn., Va., W.Va.

Discussion

Listera nipponica Makino, a species similar to L. smallii, occurs in the mountains of Japan.

Selected References

None.

Lower Taxa

None.
... more about "Listera smallii"
Lawrence K. Magrath +  and Ronald A. Coleman +
Wiegand +
Listera reniformis +
Appalachian twayblade +  and kidney-leaf twayblade +
Ga. +, Ky. +, Md. +, N.J. +, N.C. +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
600–1300 m +
Damp humus in shady forests of Appalachian Mountains, often beneath Rhododendron in acidic soil, also in sphagnous thickets and bogs +
Flowering Jun–Jul. +
Bull. Torrey Bot. Club +
Bifolium smallii +, Neottia smallii +  and Ophrys smallii +
Listera smallii +
species +