. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Eysenhardtia 561 It is very durable, takes a fine polish and is a favorite in Florida for boat building, fuel and charcoal. The bark, especially of the root, contains a sedative principle somewhat similar in its action to morphine; and the fluid extract is used to some extent in American medical practice. The genus is monotypic, and was established by Patrick Browne, by reference to Linnasus' name for the tree, and
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Eysenhardtia 561 It is very durable, takes a fine polish and is a favorite in Florida for boat building, fuel and charcoal. The bark, especially of the root, contains a sedative principle somewhat similar in its action to morphine; and the fluid extract is used to some extent in American medical practice. The genus is monotypic, and was established by Patrick Browne, by reference to Linnasus' name for the tree, and by a good description of it. Its name is from the Greek in reference to the use of the bark of its roots as a fish poison, the Caribs having used it to stupefy fish, a practice still carried on by negroes. VIII. EYSENHARDTIA GENUS EYSENHARDTIA HUMBOLDT, BONPLAND AND KUNTH Species Eysenhardtia orthocarpa S. Watson jlYSENHARDTIA contains 5 species of shrubs and small trees grow- ing naturally from the southwestern United States to Guatemala. fl It is named in honor of Karl Wilhelm Eysenhardt, Professor of Botany at Konigsberg (1794-1825); the type species is Eysenhardtia amorphoides Humboldt, Bonpland and Kunth, a shrub of wide distribution from New Mexico to Guatemala. Our tree species, E. orthocarpa, occurs from Ari- zona and western Texas to Oaxaca and Hidalgo; it is not known to exceed 7 meters in height, with a trunk 2 dm. thick. The bark is thin, light gray and scaly, the young twigs finely hairy, be- coming smooth and red-brown. The deciduous leaves are stalked, equally pinnate, with 10 to 24 pairs of leaflets, the leaf-axis grooved on the upper side and finely hairy; the leaflets are thin, oblong to oval, 2 cm. long or less, blunt or slightly notched at the apex, short-stalked, very glandular and hairy on the under side, smooth or nearly so and light green on the upper; the minute stipules are subulate. The small white flowers are in axillary hairy spikes, which appear in
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