Flora of North America species comparison

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

numerous, spreading, mostly to 1 cm diam., stout.

persisting through anthesis or fugaceous, basal, often on proximal portion of stem, ascending to spreading, linear to linear-lanceolate, elliptic, or oblanceolate, to 26 × 3 cm.

persisting through anthesis, to 4–5, basal, reduced to sheathing bracts upward on stem, spreading, linear-lanceolate, keeled, 5–25 × 1 cm.

spikes loosely to tightly spiraled, 3–7 or more flowers per cycle of spiral, sometimes nearly secund;

rachis densely pubescent, trichomes articulate, pointed, capitate glands absent.

usually very tightly spiraled, 3 flowers per cycle of spiral, rarely loosely spiraled or with more than 5 flowers per cycle;

rachis glabrous to very sparsely pubescent, capitate glands short-stalked or often sessile (longest trichomes 0.03–0.18 mm).

ascending, white to ivory, rarely yellowish white, tubular;

sepals and petals connivent, forming hood above abruptly reflexed lip;

sepals connate at base, 5.3–12.5 mm;

petals linear to ovate, apex obtuse to subacute;

lip pandurate, 4.8–10.2 × 1.6–6.8 mm, base broadly expanded, apex broadly dilated, separated by narrow isthmus, apical dilation variable, rarely lip nearly ovate, glabrous or with a few scattered trichomes on adaxial surface;

veins typically 3, branches wide-spreading;

viscidia linear-lanceolate;

ovary 2–7 mm.

nodding to somewhat ascending, white to cream, mostly gaping;

sepals distinct to base, lanceolate, 6–10 × 2–3 mm;

lateral sepals spreading;

petals oblong, 6–9 × 2 mm, apex obtuse;

lip creamy yellow centrally or some individuals with 2 brown-orange spots, ovate, 5–8 × 4 mm;

veins of lip straight, branches parallel;

basal calli conic, to 1 mm;

viscidium linear-lanceolate;

ovary mostly 8 mm.

monoembryonic.

monoembryonic.

= 44, 66, 88.

= 30.