Flora of North America species comparison

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

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

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

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.

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.

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).

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.

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.

monoembryonic.

monoembryonic.

= 30.

= 44, 66, 88.