Flora of North America species comparison

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

few–several, descending, slender to somewhat tuberously thickened, mostly to 0.5 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.

persisting through anthesis, basal and on proximal portion of stem, ascending to spreading, ovate-lanceolate to linear-lanceolate to oblanceolate, to 20 × 2 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.

loosely spiraled, usually 5 or more flowers per cycle of spiral;

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

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.

ivory to yellowish white or greenish cream, strongly nodding, curved downward throughout lengths, scarcely gaping, urceolate-tubular;

sepals distinct to base, 5.2–8 mm;

lateral sepals slightly spreading, apex straight;

petals creamy white to greenish white, ovate-elliptic to obovate, 3.9–7.6 mm, apex obtuse;

lip often darker centrally, 4.1–8 × 3.2–5.1 mm, glabrous;

veins several, branches parallel;

basal calli incurved, prominent, 0.7–1.1 mm;

viscidia linear to linear-lanceolate;

ovary 4–7 mm.

monoembryonic.

partly or wholly polyembryonic.

= 44 [66].