Flora of North America species comparison

basally swollen above tuberoid, 0.7–4.5 mm diam. distal to leaves;

bracts 3–15.

swollen at base (rarely attenuate), 2–12 mm diam. distal to leaves;

bracts (4–)12–37.

prostrate;

blade 6–19 × 1–4.5 cm.

prostrate;

blade 6–20(–38) × 1–9 cm.

± densely flowered, 3.5–32 cm;

rachis ± length of peduncle;

bracts 3–12 mm.

usually densely flowered, cylindric, 2.5–40 cm;

rachis shorter than peduncle;

bracts 6–24 mm.

± white with green or yellow-green midveins, fragrance nocturnal, strong, clovelike;

sepals 2.5–4.5 × 1–2 mm;

dorsal sepal projecting forward between petals, oblong to lanceolate;

lateral sepals reflexed-spreading, obliquely oblong-lanceolate;

petals reflexed-spreading, oblique to falcate, oblong, 2–5 × 1–2 mm;

lip straight to ± deflexed, oblong to ovate-elliptic, 2.2–5.3 × 1–2.5 mm;

spur ± horizontal, straight, 7–12 mm;

viscidia oblong, 0.5–0.7 × 0.2–0.3 mm;

rostellum blunt.

mostly white, fragrance strong at night;

sepals white with green midvein, 3–7 × 1.6–3 mm;

dorsal sepal ovate to oblong;

lateral sepals usually widespreading, ovate-elliptic to oblong-lanceolate;

petals spreading, recurved, straight, ovate to oblong-lanceolate, (3–)4–6 × 1.5–2.5 mm;

lip recurved, pale greenish to white, triangular-lanceolate to lanceolate, 2.5–7 × 1.5–3.5 mm;

spur usually deflexed, curved, (3–)7–14 mm;

viscidia 0.4–1 × 0.15–0.5 mm;

rostellum blunt.

4–13 mm.

5–12 mm.

cinnamon brown.

cinnamon brown.

= 42.

= 42.