Flora of North America species comparison

submersed with elongate internodes only on plants in over 5 cm of water, or emersed and short.

2–24 cm, distal internode 1–11 cm.

1-flowered;

spathes 0.9–4.5 cm, glabrous.

opening within 1 hour after dawn, wilting by midday;

perianth blue or white, salverform, tube 15–44 mm, limbs essentially actinomorphic, lobes equal, narrowly elliptic, 5.2–26.3 mm, distal lobes yellow toward base;

stamens unequal, lateral stamens 2.3–7.8 mm, central stamen 3.3–7.2 mm;

filaments linear, glandular-pubescent;

style glabrous.

9–14-winged, 0.5–0.8 × 0.2–0.6 mm.

leaves forming basal rosette, blade linear to oblanceolate, thin or sometimes thickened, 3.1–6 cm × 3–5 mm.

leaves emersed;

stipule 1–6 cm;

petiole 2–13 cm;

blade oblong to ovate, 1–5 cm × 4–33 mm, length equaling or greater than width;

base truncate to cuneate, apex acute.

= 14.