Flora of North America species comparison

submersed with elongate internodes, or emersed and procumbent.

submersed with elongate internodes, or emersed and procumbent.

1–9 cm, distal internode 0.5–4 cm.

1–4 cm, distal internode less than 1 cm.

spicate, 2–8-flowered, elongating in 1 day, usually shorter than spathes, terminal flower sometimes extending beyond spathe apex;

spathes 0.8–5.5 cm, glabrous;

peduncle 0.5–4.2 cm, glabrous.

spicate, 3–16-flowered, elongating in 1–2 days, longer than spathes (except on cleistogamous inflorescences);

spathes 2–7 cm, glabrous;

peduncle 4–11 cm, glabrous when emersed.

opening ca. 3 hours after sunrise, wilting by early afternoon;

perianth white, salverform, tube 5–10 mm, limbs zygomorphic, lobes narrowly elliptic, 3–6.5 mm, distal central lobe with yellow or green region at base, sometimes with distal brown spot;

stamens unequal, lateral stamens 0.9–2.2 mm, filaments linear, pubescent with white multicellular hairs toward apex;

central stamen 2.2–4.7 mm, filament sparsely pubescent with multicellular hairs;

style pubescent with multicellular hairs.

opening ca. 2 hours after dawn, wilting early afternoon;

perianth mauve or white, salverform, tube 3–12 mm, limbs zygomorphic, lobes narrowly elliptic, 3.3–5.9 mm, distal central lobe dark purple in basal 1/3, 2 yellow spots within dark area;

stamens unequal, lateral stamens 1.3–2.4 mm, filaments linear, densely pubescent with purple multicellular hairs toward apex;

central stamen 2.6–4 mm, filament sparsely pubescent with multicellular hairs;

style pubescent with multicellular hairs.

8–14-winged, 0.5–0.9 × 0.3–0.5 mm.

9–12-winged, 0.6–0.9 × 0.4–0.5 mm.

leaves forming basal rosette, blade linear to oblanceolate, thin, 2.4–3.7 cm × 3–8 mm.

leaves alternate;

blade linear to oblanceolate, thin, 37–70 × 4–6 mm, margins entire.

leaves floating or emersed;

stipule 1–5 cm;

petiole 2–13 cm;

blade reniform, 1–4 × 1–5 cm, length equal to or less than width, apex obtuse.

leaves floating or emersed;

stipule 3–5 cm;

petiole 5–15 cm;

blade cordate, 2–5 × 2–5 cm, length usually greater than width, apex obtuse.

= 48.

= 32.