Flora of North America species comparison

variable, subrhizomatous to ± ovoid, 3.1–8.1 × 3.6–10.6 cm, 0.3–1.4 times taller than long;

scales 2–3(–5)-segmented, some unsegmented, longest 3.1–7.3 cm;

stem roots absent.

rhizomatous, unbranched, continuously scaly, 1.5–4.7 × 3.5–11 cm, 0.2–0.6 times taller than long;

scales (1–)2(–4)-segmented, longest 0.9–3.7 cm;

stem roots absent.

to 1.7 m, glaucous or not.

to 1.9 m.

rounded in cross section.

rounded in cross section.

in 1–9 whorls or partial whorls, 3–25 leaves per whorl, usually ascending, 1.7–15.7 × 0.4–4.7 cm, 2.4–7.4 times longer than wide;

blade weakly oblanceolate to obovate or ± elliptic, margins usually somewhat undulate, apex acute;

veins and margins ± smooth abaxially.

occasionally scattered in young plants or in 1–5 whorls or partial whorls, 3–18 leaves per whorl, ± horizontal and drooping at tips or ascending, 7.8–29 × 0.5–4.9 cm, 2.6–29 times longer than wide;

blade elliptic to narrowly linear, or ± obovate, often lanceolate in distal leaves, margins not undulate, apex acute, often narrowly so;

veins and margins ± smooth abaxially.

racemose, 1–25(–45)-flowered.

racemose, 1–31-flowered.

pendent to nodding, not fragrant;

perianth Turk’s-cap-shaped;

sepals and petals reflexed 2/5–1/2 along length from base, yellow or orange to occasionally red, with copious maroon spots, often darker and especially reddish abaxially, not distinctly clawed;

sepals not ridged abaxially, appearing wide for their length, 3.4–7.1 × 0.8–1.9 cm;

petals 3.5–6.9 × 0.8–1.9 cm;

stamens barely to moderately exserted;

filaments moderately spreading, diverging 10°–20° from axis;

anthers pale yellow to yellow, 0.5–1.3 cm;

pollen orange or yellow;

pistil 2.4–3.7 cm;

ovary 1.1–2.2 cm;

style green;

pedicel 2.8–20.2 cm.

opening before dusk, horizontal or somewhat nodding, slightly bilaterally symmetric, strongly fragrant;

perianth funnelform;

sepals and petals recurved 3/5 along length from base, lower less recurved than upper and forming landing platform, bright yellow with sparse, usually minute maroon spots, not distinctly clawed;

sepals not ridged abaxially, oblanceolate, 7.7–10.7 × 1.1–1.7 cm;

petals noticeably wider than sepals, often very wide distally, 7.8–10.6 × 1.1–2.1 cm, apex widely acute or sometimes obtuse;

stamens barely exserted;

filaments barely spreading, diverging at 5°–12°;

anthers pale magenta-brown, 0.8–1.4 cm;

pollen rust-orange or orange-brown;

pistil 5.3–9.3 cm;

ovary 1.6–2.9 cm;

style green, often pale;

pedicel 2–17.5 cm.

2.2–5.4 × 1.1–2 cm, 1.7–3.3 times longer than wide.

3.9–5.9 × 1.1–1.7 cm, 2.5–4.4 times longer than wide.

135–330.

141–303.

= 24.

= 24.