Flora of North America species comparison

blade usually streaked with white only along midrib, sometimes with fine white lateral veins, especially near midrib, narrowly elliptic to ovate, 2.5–10.2 × 1.3–3.5 cm, apex acute.

blade distinctly lined with white or greenish white on veins throughout, broadly elliptic to broadly ovate, 2.1–6.2 × 1.3–3 cm, apex acute or obtuse.

densely to loosely spiraled or secund, 10–48-flowered;

peduncle 7–38 cm.

10–57-flowered, cylindric (equally dense on all sides);

peduncle 11–35 cm.

lateral sepals 5.7–7.8 mm;

petals connivent, hood 5–10 mm;

lip deeply concave, boat-shaped, 4.9–7.9 × 1.3–3.2 mm, margins upright or involute, apex spreading or slightly recurved, blunt, inner surface with 4 unequal rows of glandular papillae;

anther erect, base 1/3–1/2 immersed in cup-shaped clinandrium, apex acuminate;

pollinia acuminate;

rostellar beak 2-pronged, 2.3–3.6 mm, longer than body of stigma;

viscidium elongate.

lateral sepals 3.1–5.3 mm;

petals distinct;

hood 3.6–5.7 mm;

lip scrotiform, 2.5–4.2 × 2.2–3.5 mm, apex reflexed, outer surface slightly tuberculate, inner surface with somewhat thickened veins, without glandular processes;

anther inflexed, immersed in cup-shaped clinandrium, apex blunt;

pollinia blunt;

rostellum with marginal notch 0.1–0.4 mm deep;

viscidium orbiculate.

= 30.

= 26.