Flora of North America species comparison

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

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

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

usually persisting through anthesis, 3–5, basal, spreading, oval-oblanceolate, 2–6 × 1–2 cm.

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).

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.

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.

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.