Taxon	Illustrator ⠉
	Lysichiton americanus Calla palustris Peltandra sagittifolia	John Myers John Myers John Myers

Herbs, wetland. Rhizomes vertical. Leaves appearing at or soon after flowering, several, clustered, erect; petiole short; blade shiny medium green, simple, not peltate, elliptic to oblong-ovate or oblanceolate, base cuneate to subtruncate; apex obtuse to acute; primary-veins pinnate. Inflorescences: peduncle absent; spathe bright-yellow [white], boatshaped, open fully at maturity, not enclosing spadix; spadix nearly cylindric. Flowers bisexual; perianth present. Fruits embedded in white pulpy axis of spadix, green. Seeds 2 (–4), mucilage probably present. x = 14.

Distribution

ne Asia and nw North America

Discussion

Prior to recognition of the North American Lysichiton as a distinct species, the genus contained a single taxon, L. camtschatcensis. This name (in several spelling variations) was previously applied to both Asian and American Lysichiton and is now the valid name for Asian populations. Asian and American plants differ primarily in spathe color, with L. camtschatcensis having white spathes and L. americanus, with yellow spathes.

Species 2 (1 in the flora).

Selected References

Barab&eacute, D. and M. Labrecque. 1984. Vascularisation de la fleur de Lysichitum camtschatcense (Araceae). Canad. J. Bot. 62: 1971--1983.

Hultén, E. and H. St. John. 1931. The American species of Lysichitum. Svensk Bot. Tidskr. 25: 453--464.

Pellmyr, O. and J. M. Patt. 1986. Function of olfactory and visual stimuli in pollination of Lysichiton americanum (Araceae) by a staphylinid beetle. Madroño 33: 47--54.

Lower Taxa

Lysichiton americanus