Flora of North America species comparison

few, horizontally spreading, slender, mostly to 0.4 cm diam.

few, spreading to descending, slender to somewhat tuberous, mostly to 1 cm diam.

persisting through anthesis, basal, sometimes on basal portion of stem, spreading, linear-oblanceolate to narrowly elliptic, to 21 × 2 cm.

fugacious, 2 or 3, basal, reduced to bracts on stem, ascending, narrowly oblanceolate, 5–20 × 0.5 cm.

rather loosely to very tightly spiraled, 3–4 flowers per cycle of spiral, occasionally 5 or more in very loose spiral;

rachis moderately pubescent, some trichomes capitate, glands obviously stalked.

secund to loosely spiraled, 8–10 flowers per cycle of spiral;

rachis sparsely pubescent, some trichomes capitate, glands obviously stalked.

ochroleucous, ivory, creamy, yellowish, or greenish white, ascending, urceolate to somewhat gaping, claw of lip at pronounced (20–60°) angle to lamina, base cuneate, appearing strongly inflated;

sepals distinct to base, 6–14 mm;

lateral sepals appressed to petals and lip, straight, separated from dorsal sepal by mostly 0.7–1 mm;

petals linear to linear-oblong, 6–13 mm, apex acute to obtuse;

lip often more yellow centrally, oblong to ovate, 7–12 × 4–7 mm, margins crenulate, glabrous;

veins several, branches parallel;

basal calli incurved, prominent, very rarely conic, 1–2 mm;

viscidia linear;

ovary 3–7 mm.

nodding, white;

sepals elliptic, 5 × 1 mm;

lateral sepals distinct to base, curving slightly downward, oblique;

petals green at base, oblique, elliptic, 5 × 1.5 mm;

lip green with white apex, ovate, 4 × 2 mm;

veins parallel;

basal calli very short, stout, to 0.3 mm;

viscidium linear-lanceolate;

ovary mostly 3 mm.

monoembryonic.

monoembryonic.

= 30.