Flora of North America species comparison

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

few–numerous, spreading to descending, mostly to 0.5 cm diam., stout.

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

usually persisting through anthesis, 3–5, basal, spreading, oval-oblanceolate, 2–6 × 1–2 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 glabrous to sparsely pubescent, trichomes commonly minute, abortive;

any glands stalked, trichomes then capitate.

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.

creamy yellow to pale greenish yellow;

sepals 5 × 1 mm, distinct to base, appressed;

petals elliptic, slightly oblique, linear to lance-oblong, 5 × 1 mm, apex acute to obtuse;

lip commonly yellow centrally, ovate to oblong, 5 × 2.5 mm, apex dilated, yellow and papillate-pubescent, its margin crisped, finely lacerate;

veins several, branches very short;

basal calli long-pointed, mostly to 1 mm;

viscidium linear-lanceolate;

ovary mostly 3 mm.

monoembryonic.

monoembryonic.

= 30.