Flora of North America species comparison

numerous, mostly to 1 cm diam., stout.

few, descending, tuberous, mostly to 0.8 cm diam.

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.

fugaceous or rarely persisting to anthesis, basal, ascending, linear-lanceolate to oblanceolate, to 16 × 1.5 cm.

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.

usually very tightly spiraled, 3–4 flowers per cycle of spiral;

rachis moderately pubescent, some trichomes capitate, glands obviously stalked (longest trichomes 0.2–0.52 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.

abruptly nodding from base, white to ivory, gaping, lip not strongly curving from claw, not urceolate;

sepals distinct to base, 5–14 mm;

lateral sepals wide-spreading, commonly ascending above flower;

petals linear to lance-oblong, 4.9–13 mm, apex acute to obtuse;

lip commonly yellow centrally, ovate to oblong, 4.9–12 × 3.3–7 mm, margins crenulate, glabrous;

veins several, branches parallel;

basal calli short-conic, mostly to 1 mm;

viscidia linear-lanceolate;

ovary 4–10 mm.

monoembryonic.

monoembryonic.

= 30.