Flora of North America species comparison

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

numerous, mostly to 1 cm diam., stout.

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

fugacious or persisting through anthesis, to 3–5, cauline, reduced to sheathing bracts upward on stem, spreading, linear-lanceolate, keeled, 5–15 × 0.5 cm, rigid.

spikes loosely to tightly spiraled, usually no more than 180°, 5–9 flowers per cycle of spiral, sometimes secund;

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

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.

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.

mostly horizontal, strongly gaping, white to cream;

sepals distinct to base, lanceolate, tapering in distal 1/3, (8–)9–10 × 2–3 mm;

lateral sepals widely spreading;

petals linear, slightly falcate, 7–9 × 2–2.5 mm;

lip yellow centrally, ovate in general outline, base rounded-dilated, apical portion descending, oblong, 8–11 × 4 mm, apex recurved with margin crisped;

basal calli erect, tapered, to 1 mm;

viscidium linear-lanceolate;

ovary mostly 7 mm.

monoembryonic.

monoembryonic.

= 30.