Flora of North America species comparison

basal, 3–5 mm diam.

basal, 1–2.5 mm diam.

unbranched, straight, terete, 2–5 cm.

unbranched, straight, terete proximally, compressed distally, to 90 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.

4–10, evenly distributed on distal 1/2 of stem;

petiole to 46 mm;

blade elliptic, 2-lobed, 6–15 × 0.5–3 cm, leathery.

erect, racemose, 3–26 cm;

peduncle 2–10 cm;

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

nearly corymbose;

peduncle zigzag, branching with time, greater than 5 mm, producing flowers over several years.

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.

resupinate, produced in succession, 1–2 at a time;

sepals yellowish, narrowly linear-lanceolate, to 60 × 6 mm, apex acute;

petals yellowish, narrowly linear-lanceolate, to 58 × 2 mm;

lip white, deeply 3-lobed, middle lobe narrowly linear-acuminate, overall to 24 × 40 mm, lateral lobes obliquely semiovate;

callus yellow;

column 18 mm;

clinandrium hood surpassing anther, erose;

anther ovoid;

ovary 45–50 mm.

ellipsoid;

pedicel 7–11 mm;

body 14–23;

beak 5 mm.

ellipsoid;

pedicel 7–14 mm;

body 25–32 × 10–15 mm;

beak 16 mm.

cespitose, to 100 cm.