Flora of North America species comparison

slender, fibrous;

pseudobulbs green, conic, ovoid, or ellipsoid, slightly compressed, soft (2 pseudobulbs typically present, parent pseudobulb enveloped in old leaf-bases, connected laterally by short rhizome to daughter pseudobulb, which gives rise to current year’s stem, parent pseudobulb often retaining dried stem of previous year).

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

somewhat angled, slender, glabrous;

cauline bracts 2(–3), enclosing base of stem.

2;

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

2 or 3–7, basal, sheathing pseudobulb and proximal part of stem, conduplicate or plicate, glabrous.

2–10 cm;

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

pedicels slender, 3–5 mm.

terminal, 3–40-flowered racemes, lax;

peduncle and rachis glabrous;

floral bracts subulate to triangular-lanceolate.

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.

resupinate, maroon-purple, yellowish green, or green, pedicellate;

dorsal sepal oblong-elliptic, linear-oblong, oblong-lanceolate, or lanceolate, margins revolute, apex obtuse to acute;

lateral sepals oblong-lanceolate, lanceolate, ovate-oblong, or elliptic, falcate or not, margins revolute or involute, apex obtuse to acute;

petals filiform, linear, linear-oblanceolate, or narrowly spatulate, tubular or strongly revolute;

lip strongly arcuate-recurved, obcordate, oblong-flabellate, or suborbiculate, base broadly cuneate, slightly auriculate, apex emarginate or subtruncate, mucronate or not, apical margins erose-serrulate to crenulate-wavy;

column arcuate, slender to stout, weakly to strongly winged at apex;

anther apical, anther cap yellow or green;

pollinia 2 pairs, yellow, waxy.

capsules, erect, ellipsoid to ovoid, obscurely to prominently winged, glabrous.

pedicel 3–7 mm;

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

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

= 32, 26.