OregonFlora: Platanthera grandiflora vs. Platanthera stricta

	Platanthera grandiflora	Platanthera stricta
		slender bog orchid
Stems		10–65 cm tall.
Leaves		cauline, 4–10, oblong to linear-lanceolate, 10–11 × 1–3 cm, green through anthesis; apex obtuse; lower leaves clasping stem; upper leaves becoming bracts within the inflorescence.
Inflorescences		densely to loosely 20–40-flowered.
Flowers		more or less spreading, green; dorsal sepal ovate, 3–5 × 3–4 mm; lateral sepals lanceolate and oblique, 4–6 × 2–3 mm; petals lanceolate, sickleshaped, 3–5 × 1–2.5 mm; lip linear-elliptic to lanceolate, 4–8 × 1–2 mm, descending; spur shorter than lip and distinctly pouchshaped.
2n		=42.

	Platanthera grandiflora	Platanthera stricta
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Wet meadows, roadside ditches, stream sides, fens, seeps, springs. Flowering Jun–Aug. 0–2300m. BW, Casc, CR, ECas, Est, Sisk. CA, ID, WA; north to AK, east to WY. Native. Widespread, P. stricta is easily identified by its distinctive pouch-like spurs.
Source		Flora of Oregon, volume 1, page 328 James Riser
Sibling taxa	P. aquilonis, P. dilatata, P. elegans, P. elongata, P. ephemerantha, P. huronensis, P. obtusata, P. sparsiflora, P. stricta, P. transversa, P. unalascensis	P. aquilonis, P. dilatata, P. elegans, P. elongata, P. ephemerantha, P. huronensis, P. obtusata, P. sparsiflora, P. transversa, P. unalascensis
Synonyms		Habenaria saccata, Limnorchis stricta, Limnorchis viridiflora
Web links	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	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Platanthera grandiflora

Platanthera stricta

slender bog orchid

Stems

10–65 cm tall.

Leaves

cauline, 4–10, oblong to linear-lanceolate, 10–11 × 1–3 cm, green through anthesis;

apex obtuse; lower leaves clasping stem; upper leaves becoming bracts within the inflorescence.

Inflorescences

densely to loosely 20–40-flowered.

Flowers

more or less spreading, green;

dorsal sepal ovate, 3–5 × 3–4 mm;

lateral sepals lanceolate and oblique, 4–6 × 2–3 mm;

petals lanceolate, sickleshaped, 3–5 × 1–2.5 mm;

lip linear-elliptic to lanceolate, 4–8 × 1–2 mm, descending;

spur shorter than lip and distinctly pouchshaped.

=42.

Platanthera grandiflora

Platanthera stricta

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Wet meadows, roadside ditches, stream sides, fens, seeps, springs. Flowering Jun–Aug. 0–2300m. BW, Casc, CR, ECas, Est, Sisk. CA, ID, WA; north to AK, east to WY. Native.

Widespread, P. stricta is easily identified by its distinctive pouch-like spurs.

Source

Flora of Oregon, volume 1, page 328
James Riser

Sibling taxa