Page authors: Don Knoke, David Giblin
Neottia banksiana
northwestern twayblade

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta and Wyoming.

Habitat: Moist forests and wet meadows, lowlands to subalpine elevations

Flowers: June-August

Origin: Native

Conservation Status: Not of concern


Small, perennial herbs with a simple stem 10-35 cm. tall, glabrous below the leaves and strongly glandular-pubescent above.


Leaves 2, opposite, attached well above mid-length on the stem, lanceolate to ovate, 2.5-6 cm. long, rounded to abruptly acute.


Inflorescence a terminal, bracteate, open, 5- to 25-flowered raceme, the bracts conspicuous, 3-8 mm. long; pedicles very slender, 5-10 mm. long; sepals 3, spreading, narrowly lanceolate, 3-4 mm. long, 1-nerved; 2 small petals narrower than the sepals, spreading; third petal (lip) obovate with a wedge-shaped base, 4.5-7.5 mm. long, angled downward, rounded to truncate, with a erect, filiform tooth 1 mm. long just above the base on both sides; stamens and style fused to form a column about 2 mm. long.



Accepted Name:
Neottia banksiana (Lind.) Rchb. f.
Publication: Ann. Bot. Syst. (Walpers) 3(4): 595. 1852.

Synonyms & Misapplications:
Listera banksiana Lindl.
Listera caurina Piper [FNA26, HC]
Listera retusa Suksd.
Neottia caurina (Piper) Szlachetko
Ophrys caurina (Piper) Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Neottia banksiana in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Neottia banksiana checklist entry.

E-Flora BC: Neottia banksiana atlas page.

CalPhotos: Neottia banksiana photos.

USDA Plants: Neottia banksiana information.

39 photographs:
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