Central America is a small region (three-fourths the size of Texas) with one of the most diverse moss floras of any area of the world. The mosses of Central America are not especially endemic, but rather represent an eclectic moss flora produced by the pronounced vertical relief of the region and its close physical position to three species-source areas: South America, North America, and the Caribbean. In addition, many species from Africa and Southeast Asia are found in the region. Central America as here delimited is political; it includes all parts of Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, and Panama.
The Moss Flora of Central America is a four-part, revisionary flora. This volume gives keys, descriptions, and discussions for 208 of the 968 moss species. In addition, for each species precise type information is provided; distribution within Central America is documented by the examination of specimens; world distribution is indicated; habitat notes based on personal field experience or taken from collection labels are provided; and a list of previously published illustrations is given.