Flora of North America species comparison

few, fleshy;

tuberoids ellipsoid-ovoid.

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

bracts (4–)12–37.

simple.

prostrate;

blade 6–20(–38) × 1–9 cm.

ephemeral, 2–6, basal;

blade sessile, lanceolate to oblanceolate;

cauline bracts ovate to linear-lanceolate.

usually densely flowered, cylindric, 2.5–40 cm;

rachis shorter than peduncle;

bracts 6–24 mm.

many-flowered racemes or spicate racemes.

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.

resupinate, white, yellow-green to green, nearly sessile;

sepals 1–3-veined;

lateral sepals similar, adnate to lip and slightly longer than free dorsal sepal;

lip base adnate to column, blade simple, midrib thickened, broad;

spur clavate to filiform;

column short, auricles absent;

anther 1, erect, connective narrow, cells close and parallel;

pollinaria 2;

pollinia 2, sectile;

caudicles inconspicuous, attached to round to oblong viscidia;

stigmas confluent, concave;

rostellum 3-lobed.

capsules, erect, nearly sessile, ellipsoid to sausage-shaped.

5–12 mm.

cinnamon brown.

= 21.

= 42.