Flora of North America species comparison

subrhizomatous to ± ovoid, 2.7–10 × 4.4–13.4 cm, 0.2–0.9(–1.4) times taller than long;

scales unsegmented or notched with 2(–3) poorly defined segments, sometimes 2-segmented, longest 3.3–11.9 cm;

stem roots absent.

widely ovoid, 3.5(–8) × 4–8 cm, ca. 0.7–0.8 times taller than wide;

scales broad, unsegmented, longest ca. 3–4 cm;

stem roots usually present.

to 2 m, often glaucous.

white-lanate, purplish, to 2 m.

rounded in cross section.

usually flat-sided, somewhat triangular in cross section.

in 1–8 whorls or partial whorls, 3–16 leaves per whorl, horizontal and drooping at tips to ascending, occasionally nearly clasping stem, 3.7–12.3 × 0.9–4.7 cm, 2–6.5 times longer than wide;

blade oblanceolate, sometimes obovate, rarely elliptic, margins undulate or not, apex acute, often widely so;

veins and margins ± smooth abaxially.

scattered, horizontal and drooping at tips, 10–15(–18) × ca. 1.5 cm, ca. 3–6(–10) times longer than wide, distal bearing 1(–3) dark purple axillary bulbils;

blade lanceolate, often narrowly so, margins not undulate, papillose, apex white-lanate, narrowly acute (rounded in distal leaves).

racemose, 1–33-flowered.

racemose, 3–6(–25)-flowered.

opening before dusk, ± horizontal, slightly bilaterally symmetric, strongly fragrant;

perianth ± funnelform;

sepals and petals recurved 2/3–3/4 along length from base and scarcely overlapping to form tube, lower usually less recurved than upper and forming landing platform, white, often aging deep pink or lavender, often with short yellowish stripe extending from basal median nectaries, often with fine magenta spots concentrated basally, not distinctly clawed;

sepals sometimes purplish abaxially, not ridged abaxially, (6.1–)6.7–11.3 × 0.9–1.7 cm;

petals noticeably wider than sepals, oblanceolate and often very wide distally, (6.1–)6.6–11.2 × 1.1–2.4 cm, apex widely acute, obtuse, or rounded;

stamens barely exserted;

filaments barely spreading, diverging 2°–8° from axis;

anthers off white or cream, becoming pale pink or yellow, 0.8–1.5 cm;

pollen yellow or cream;

pistil 7.5–10.4 cm;

ovary 1.7–3.4 cm;

style pale green;

pedicel 4.8–15 cm.

pendent, not fragrant;

perianth Turk’s-cap-shaped;

sepals and petals reflexed ca. 1/5–1/4 along length from base, orange with many purple-brown spots, not distinctly clawed, 7–10 × 1–2 cm, adaxial base bearing pubescent strip;

sepals not ridged abaxially;

stamens strongly exserted;

filaments very widely spreading, diverging ca. 25° from axis;

anthers purplish, ca. 2 cm;

pollen rust;

pistil 6–9 cm;

pedicel sometimes dichotomous, stout and relatively short, to 10 cm.

often with 6 longitudinal ridges, 2.7–5.8 × 1.6–2.9 cm, 1.3–2.3 times longer than wide.

3–4 cm.

123–231.

not counted.

= 24, 36.