r.1 - part

Illustrations
Illustrations, including drawings and maps, have been compiled from
various publications. Most of these illustrations are older drawings skillfully
executed from living plants. Most show a leafy twig, flowers, and fruits; many
also have details enlarged. Illustrations for a few species are incomplete.
Because these illustrations comc from many sources and are by different ar.
tists, they vary in style and detail. Some are from early works long out of print.
However, these drawings are still useful for identification today.
Published distribution maps showing natural ranges for 61 species are
reproduced here. A few are from taxonomic monographs. Fifteen for Australia
(most from Hall et al., 1970) show the entire natural range. However, many
show only part of the extent within one country or region. Sixteen are for India
and adjacent countries (Pearson and Brown, 1932). Nine are from southern
Africa (Coates Palgrave, 1977). Eight for the United States and 4 for Puerto
Rico are from the author's publications. Though incomplete, these maps may
be useful in indicating seed sources.
References
References, chosen mainly to assist in identification, are cited after the text
describing each species. Firewood Crops lists more titles and publications with
additional information on cultivation, growth, and yield are available for
many species.
Most countries possess technical, often lengthy, descriptive floras, for identification
of seed plants, including trees and shrubs. Many geographical or
political divisions have useful illustrated handbooks for naming common trees
and shrubs. However, these publications generally emphasize the native
species and may not contain recent introductions such as fuelwood crops.
Statistical Summary
The 90 firewood species described and illustrated here are classified in 48
genera and 22 piant families; they thus represent many environments. Thirtyfive
species, more than one-third, belong to the Legume Family, Leguminosae,
including 10 in the genus Acacia, acacia, and 7 in Prosopis, mesquite. The
Myrtle Family, Myrtaceae, has 13 species, of which 10 are in the genus
Eucalyptus, eucalyptus.
The remaining 42 species are distributed Lmong 20 plant families with I to 4
species each. The genus Trema, trema, has 4 species described, while 4 genera
have 3 each: Alnus, alder; Avicennia, black-mangrove; Casuarina,casuarina;
and Pinus, pine.
Conifers, or softwoods, are represented by only the Pine Family, Pinaceae,
with 3 species in the genus Pinus, pine. All the others are hardwoods, or
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