Flora of North America species comparison

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.

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 1.9 m. Buds rounded in cross section.

to 2.2 m. Buds rounded in cross section.

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.

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, 1–31-flowered.

racemose, 1–15(–25)-flowered.

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.

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.

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

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

141–303.

96–169.

= 24.

= 24.