Arisaema is a large genus within the Arum family, consisting of about 200 species, subspecies, and varieties distributed widely around the globe. They are remarkable for their exotic-looking inflorescences-which inspired the common name of cobra lily-and for the fact that they can change sex from year to year. The Genus Arisaema (2002) was the first comprehensive study of the genus since 1920, and indeed the first ever in the English language. ...