Synonyms: Habenaria hyperborea Other names: green rein-orchid Nomenclature: hyperborea = extreme northern Nativity / Invasiveness: Montana native plant
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General: erect perennial, hairless, 20-100 cm tall, the stem leafy, from fleshy, tuber-like roots.
Leaves: alternate, several, mostly on the lower half of the stem, narrowly oblong-elliptic to lanceolate, 6-20 cm long and 1-3 cm broad, blunt to slenderly pointed.
Flowers: pale to deep greenish, often somewhat purplish-tinged, many in a tall, dense spike, 5-20 cm long, with bracts at bases. Sepals ovate-lanceolate, blunt-tipped, 3-nerved, the upper one broader, hooded, 4-7 mm long, the lower 4-7 mm long, spreading. Petals lanceolate, the upper ones bent inward, about equalling the upper sepal and touching it, forming a distinct hood. Lip 4-7 mm long, rather fleshy, usually thrust forward, the tip rounded. The spur cylindric to club-shaped, straight to slightly curved, from shorter to barely longer than the lip. Pollen sacs well separated.