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bog twayblade, fen orchid, Loesel's liparis, Loesel's twayblade, Loesel's wide-lipped orchid, yellow wide-lip orchid

Habit Plants 6–26 cm.
Stems

pale green or yellowish green, angled, sometimes obscurely winged or fluted distally.

Leaves

2;

blade conduplicate, green, glossy, oblong-elliptic to elliptic-lanceolate, keeled abaxially, 3.7–18 × 1–4 cm, succulent, apex obtuse to subacute.

Inflorescences

2–10 cm;

floral bracts subulate, minute, 2 × 1 mm, apex acute;

pedicels slender, 3–5 mm.

Flowers

2–15, green or yellowish green to yellowish white or greenish white;

dorsal sepal oblong-lanceolate to narrowly lanceolate, 4.5–6 × 1–2 mm, apex obtuse to acute;

lateral sepals oblong-lanceolate to narrowly lanceolate, 4.5–5.5 × 1–2.2 mm, apex obtuse to acute;

petals pendent, slightly curved, tubular, filiform, 4.5–5.5 × 0.5–1 mm, margins strongly revolute;

lip translucent to opaque, green or yellowish green to yellowish white, obovate to oblong to suborbiculate, 4–5.5 × 2.2–3.5 mm, base narrowly cuneate, slightly auriculate, margins crenulate-wavy, apex subtruncate to obtuse, mucronate;

disc with central elongate thickening;

column short, stout, 2–3 × 0.5–1 mm, winged apically;

anthers yellow;

pollinia yellow.

Capsules

pedicel 3–7 mm;

body obovate to ellipsoid, 9–13 × 3–6 mm, veins often slightly winged.

Pseudobulbs

ovoid, 10 × 5 mm, sheathed by bracts and persistent leaf bases, previous year’s pseudobulb usually present, connected by short rhizome.

2n

= 32, 26.

Liparis loeselii

Phenology Flowering May–Aug.
Habitat Cool, moist ravines, bogs, or fens, wet peaty or sandy meadows, and exposed sand along edges of lakes, often colonizing previously open and disturbed habitats during early and middle stages of reforestation
Elevation 100–1100 m (300–3600 ft)
Distribution
from FNA
AL; AR; CT; DE; IA; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NY; OH; PA; RI; TN; VA; VT; WA; WI; WV; BC; MB; NB; NS; NT; ON; PE; QC; SK; w Europe; c Europe
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[BONAP county map]
Discussion

Liparis loeselii is such a small orchid that it can be easily overlooked; it may have a wider distribution than has been reported. Rain-assisted self-pollination in this species was described by P. M. Catling (1980).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 626.
Parent taxa Orchidaceae > subfam. Epidendroideae > tribe Malaxideae > Liparis
Sibling taxa
L. liliifolia, L. nervosa
Synonyms Ophrys loeselii, Leptorchis loeselii, L. correana, Malaxis correana, Malaxis longifolia
Name authority (Linnaeus) Richard: De Orchid. Eur., 38. (1817)
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