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.

often yellowish, rhizomatous, unbranched, 2.2–2.6 × 3.8–5 cm, 0.5–0.6 times taller than long, 2 years’ growth evident as annual bulbs, scaleless sections between these 1.2–2.5 cm;

scales 1–2-segmented, longest 0.9–2.2 cm;

stem roots present.

to 2 m, often glaucous.

to 1.3 m.

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.

in 3–5 whorls or partial whorls, 3–12 leaves per whorl, ± horizontal to occasionally slightly ascending, drooping at tips, 4.1–12.7 × 1.5–3.6 cm, 1.9–5 times longer than wide;

blade elliptic, occasionally narrowly so or barely lanceolate, margins not undulate, apex acute, usually barely acuminate in distal leaves;

principal veins impressed adaxially, veins and margins noticeably roughened abaxially with tiny ± deltoid epidermal spicules, especially apically and on proximal leaves.

racemose, 1–33-flowered.

racemose, 1–9(–16)-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.

nodding, not fragrant;

perianth campanulate;

sepals and petals barely recurved 2/3–9/10 along length from base, yellow-orange proximally, pale red distally, spotted maroon, pale red or sometimes red-orange abaxially, not distinctly clawed;

sepals not ridged abaxially, 3.2–5.6 × 1.3–2 cm;

petals 3.1–5.5 × 1.2–2 cm;

stamens included;

filaments ± parallel to style, barely spreading, diverging 3°–9° from axis, red;

anthers magenta, 0.4–1.2 cm;

pollen brown-rust;

pistil 2.4–3.8 cm;

ovary 0.8–1.7 cm;

style red;

pedicel 2.6–6.5 cm.

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

2.1–3.7 × 1.5–2.1 cm, 1.5–2.1 times longer than wide.

123–231.

not counted.

= 24.