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.

rhizomatous, unbranched, continuously scaly, 1.4–3.1 × 3.8–8.2 cm, 0.3–0.6 times taller than long;

scales 2–3-segmented, a few unsegmented, longest 0.8–2.7 cm;

stem roots absent.

to 2 m, often glaucous.

to 2.2 m. Buds rounded in cross section.

rounded 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 or usually in 1–4 whorls or partial whorls, 3–10 leaves per whorl, horizontal and drooping at tips, 7.8–15.8 × 1.1–5.3 cm, 3.2–10.8 times longer than wide;

blade usually elliptic, occasionally weakly lanceolate or oblanceolate, margins not undulate, apex narrowly acute;

veins and margins ± smooth abaxially.

racemose, 1–33-flowered.

racemose, 1–15(–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, mildly fragrant;

perianth Turk’s-cap-shaped;

sepals and petals reflexed 2/5 along length from base, yellow or yellow-orange, usually with copious maroon spots, not distinctly clawed;

sepals not ridged abaxially, 4.3–5.7 × 0.9–1.5 cm;

petals 4.2–5.7 × 0.9–1.5 cm;

stamens moderately exserted;

filaments moderately spreading, diverging 9°–19° from axis;

anthers magenta or dull red, 0.3–0.6 cm;

pollen pale orange, rust, orange, or tan-orange;

pistil 2.6–3.4 cm;

ovary 0.8–1.4 cm;

style green;

pedicel 8.5–20.7 cm.

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

1.5–2.9 × 1–1.9 cm, 1.1–2 times longer than wide.

123–231.

96–169.

= 24.