Flora of North America species comparison

few–several, spreading to descending, tuberous, mostly to 1 cm diam.

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

persisting through anthesis or fugaceous, basal, often on proximal portion of stem, ascending, linear to linear-lanceolate, linear-oblanceolate, oblanceolate or elliptic, to 34 × 3.5 cm.

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

usually very tightly spiraled, rarely loosely spiraled, usually 3 flowers per cycle of spiral;

rachis glabrous to sparsely pubescent, trichomes less (usually much less) than 0.18 mm, capitate glands often sessile.

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).

ascending, creamy to markedly yellowish, slenderly tubular;

sepals connate at base, 4.6–11 mm, apex reflexed-spreading;

petals linear-lanceolate to linear-oblanceolate, apex reflexed-spreading, obtuse to subacute or subemarginate;

lip lance-ovate to lanceolate, 4–9.5 × 1.9–4.3 mm, apex recurved less than to scarcely more than apices of sepals and petals, only slightly or not at all dilated, with subapical dense cushion of peg-shaped trichomes on adaxial surface;

veins few to several, branches wide-spreading or often parallel;

viscidia linear to linear-elliptic;

ovary mostly 2–7.5 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.

= 44 [66].

= 30.