OregonFlora: Platanthera huronensis

	Platanthera huronensis
	green bog orchid
Stems	20–65 cm tall.
Leaves	cauline, 2–4, oblong to linear-lanceolate, 10–18 × 1–2 cm; lower leaves clasping stem; upper leaves becoming bracts within the inflorescence, green through anthesis.
Inflorescences	densely to loosely 20–60-flowered.
Flowers	more or less spreading, green to whitish green; petals often lighter than sepals; dorsal sepal ovate, 3–7 × 2–4 mm; lateral sepals ellipticlanceolate and oblique, 3–9 × 1–3.5 mm, spreading to reflexed; petals ovate-lanceolate; sickle-shaped, 3–8 × 1.5–4 mm; lip elliptic to lanceolate whitish green, basally dilated, 5–12 × 2–4 mm, descending or the apex caught in the tip of the converging dorsal sepal and petals; spur cylindrical and tapering; more or less equal in length to lip, 4–12 mm.

	Platanthera huronensis
Distribution	[WildflowerSearch map] [BONAP county map]
Discussion	Wet meadows, roadside ditches, stream sides, fens, seeps, springs. Flowering Jun–Aug. 100–2000 m. BW. Throughout northern North America. Native. Platanthera huronensis can be difficult to differentiate from P. aquilonis, especially in dried, pressed examples (see P. aquilonis).
Source	Flora of Oregon, volume 1, page 328 James Riser
Sibling taxa	P. aquilonis, P. dilatata, P. elegans, P. elongata, P. ephemerantha, P. obtusata, P. sparsiflora, P. stricta, P. transversa, P. unalascensis
Synonyms	Habenaria hyperborea, Platanthera hyperborea
Web links	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Platanthera huronensis

green bog orchid

Stems

20–65 cm tall.

Leaves

cauline, 2–4, oblong to linear-lanceolate, 10–18 × 1–2 cm; lower leaves clasping stem; upper leaves becoming bracts within the inflorescence, green through anthesis.

Inflorescences

densely to loosely 20–60-flowered.

Flowers

more or less spreading, green to whitish green;

petals often lighter than sepals;

dorsal sepal ovate, 3–7 × 2–4 mm;

lateral sepals ellipticlanceolate and oblique, 3–9 × 1–3.5 mm, spreading to reflexed;

petals ovate-lanceolate; sickle-shaped, 3–8 × 1.5–4 mm;

lip elliptic to lanceolate whitish green, basally dilated, 5–12 × 2–4 mm, descending or the apex caught in the tip of the converging dorsal sepal and petals;

spur cylindrical and tapering; more or less equal in length to lip, 4–12 mm.