Listera convallarioides

Listera convallarioides (Sw.) Nutt.:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Listera convallarioides (Sw.) Nutt. ex Elliott:
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

St. Pierre and Miquelon; Alta., B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Alaska (including Aleutian Islands), Ariz., Calif., Colo., Idaho, Maine, Mich., Minn., Mont., Nev., N.H., N.Y., Oreg., S.Dak., Utah, Vt., Wash., Wis., Wyo.

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Global Range: In eastern North America, this ranges from Newfoundland to southern Quebec, southern Ontario, and northeastern Minnesota, south to the northern sections of Wisconsin, Michigan, New York, Vermont, and Maine. In western North America, this ranges from southern Brishish Columbia south to the high elevations of California, Arizona, Neveda, Utah, and Colorado. It is disjunct to South Dakota and scattered locations in northern British Columbia and the Aleutians.

Plants 5–37 cm, somewhat stoloniferous. Stems green, succulent, glabrous. Leaves: blade green, broadly ovate to elliptic, oval or suborbiculate, 2–7 × 1.5–5.8 cm, apex obtuse to rarely acute or apiculate. Inflorescences 5–20-flowered, lax, 20–120 mm; floral bracts semitranslucent, rhombic-ovate to lanceolate, 3–5 × 1–2.5 mm, apex acute to acuminate; peduncle and rachis densely whitish glandular-pubescent. Flowers yellowish green, sometimes faintly tinged with purple; pedicels slender, 2.5–7 mm, glandular-pubescent; ovary glandular-pubescent, becoming glabrate as it matures; sepals and petals reflexed away from column and lip; dorsal sepal ovate-lanceolate to elliptic, 4.5–5 × 1.5–2 mm, apex obtuse to acute; lateral sepals lanceolate, falcate, 4.5–5.5 × 1.5–1.8 mm, apex acute to obtuse; petals linear, falcate, 4–5 × 0.8–1 mm; lip cuneate, apex dilated and shallowly notched, lateral lobes rounded, with small tooth in sinus, tapering to short, slender claw, with indistinct triangular tooth on either side of base above claw, 8–13 × 5–7 mm, margins minutely bristly-ciliate; column arcuate, slender, 2.5–3.5(–4) × 1 mm, apex slightly expanded. Capsules ellipsoid, 8 × 5 mm, essentially glabrous. 2n = 36.

Epipactis convallarioides Swartz, Kongl. Vetensk. Acad. Nya Handl. 21: 232. 1800; Bifolium convallarioides (Swartz) Nieuwland; Diphryllum convallarioides (Swartz) Kuntze; Listera eschscholziana Chamisso; Ophrys convallarioides (Swartz) W. Wight ex House

Rich humus in open woods to boggy meadows, soil circumneutral or at most only mildly acid, prefers cool soil; widespread across northern part of continent, extending southward only at high elevations; 100--2600m.

Comments: Moist sites along steams and lake shores (B74WEL01AKUS).

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: > 300

Flowering Jun--Sep.

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G5 - Secure

Reasons: Patchy distribution through much of North America, with thousands of occurrences.