Flora of North America species comparison

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

few, slender to tuberously thickened, horizontally spreading to descending, mostly to 1 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 or fugaceous, basal, sometimes on proximal portion of stem, ascending to spreading (flaccidly so because of membranaceous blades with thickened midribs);

petiole usually slender, less than 6 mm wide;

blade linear-lanceolate to linear-oblanceolate, oblanceolate, obovate, or elliptic, to 26 × 2 cm.

spikes very tightly to rather loosely spiraled, 3–4 flowers per cycle of spiral, rarely in loose spiral with 5 or more flowers per cycle;

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

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.

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.

white to ochroleucous, creamy, or ivory, occasionally green or rarely yellowish, nodding only at base of perianth or occasionally ascending, urceolate to gaping, base usually appearing only slightly inflated, claw of lip at low (less than 30°) angle to lamina, or occasionally not opening;

sepals distinct to base, 6–12 mm;

lateral sepals appressed to spreading, apices incurved or sometimes straight, sometimes arching above flower;

petals linear-lanceolate, 6–12 mm, apex acute to obtuse, occasionally broad and liplike;

lip often yellow centrally, ovate to oblong in general outline, usually constricted at middle, 6–10.5 × 2–7.5 mm, base ± prominently dilated, suborbiculate, orbiculate, or linear, margins crenulate, lacerate or sometimes entire, apex acute to rounded distally, glabrous;

veins several, branches parallel;

basal calli usually incurved, prominent to conic, small, mostly 0.5–1.2 mm, or sometimes lip undifferentiated from petals;

viscidia linear to linear-lanceolate;

ovary 3–14 mm.

monoembryonic.

polyembryonic, often also monoembryonic, rarely wholly monoembryonic; typically showing irregularities such as embryos developing through or outside testa or naked embryos mixed with whole seed.

= 44 [66].

= 45, 60.