Flora of North America species comparison

basal, 3–5 mm diam.

basal, 1.5–4 mm diam.

unbranched, straight, terete, 2–5 cm.

unbranched, straight, compressed, to 60 cm.

2–3, near apex of stem;

petiole to 1.5 cm;

blade narrowly elliptic, 1–9.5 × 0.4–1.3 cm, nearly leathery, apex acute.

5–13;

petiole 20–36 mm;

blade elliptic, obtuse, middle ones somewhat larger than basal or apical, 4–18 × 1–4 cm, leathery.

erect, racemose, 3–26 cm;

peduncle 2–10 cm;

bracts triangular, to 1/2 length of ovary, 12–18 mm, apex acuminate.

racemes, subcapitate, densely flowered, 10–50 cm; 1st raceme terminal, producing additional racemes from nodes of long peduncle over years;

peduncle elongate, laterally compressed, 9–48 cm.

6–14, spread along apical 1/2 of inflorescence, resupinate, simultaneous, pale green to bronze-colored;

sepals wide open, narrowly obovate, 5-veined, 6–11 × 2–3 mm, margins revolute, apex obtuse;

petals narrowly oblanceolate, 1-veined, 6–11 × 1–2 mm, apex rounded;

lip base cordate, 3-lobed, middle lobe triangular, apex rounded to slightly notched, 2-callose, with low midrib, 4–6 × 5–7 mm, lateral lobes semiorbiculate;

column 11–12 mm;

clinandrium hood erose, covering anther;

anther ovate, with low keel along front;

ovary 12–18 mm.

to 25 per raceme, not resupinate, spirally oriented, yellow-green to red-brown;

sepals obovate-elliptic, 5.5–7.5 × 3–4 mm, fleshy, apex obtuse;

petals narrowly oblanceolate, thin, 5–7 × 0.5–1 mm, apex obtuse;

lip cordate, apex 2-lobed, 4–6 × 4.5–7 mm, fleshy, with prominent longitudinal ridge terminating in fleshy mucro;

column 5 mm;

anther ovoid, apex saddle-shaped;

ovary 7–14 mm.

ellipsoid;

pedicel 7–11 mm;

body 14–23;

beak 5 mm.

subglobose;

pedicel 6.5 mm;

body 7.5 × 6 mm;

beak obsolete.