Ae. octandra, Marsh.
The sweet buckeye is a handsome, large tree with greenish yellow, tubular flowers and leaves of five slender, elliptical leaflets. Cattle will eat the nuts and paste made from them is preferred by bookbinders; it holds well, and book-loving insects will not attack it. These trees grow on mountain slopes of the Alleghanies from western Pennsylvania southward, and west to Iowa and Texas.
The California Buckeye
Ae. californica, Nutt.
The California buckeye spreads wide branches from a squat trunk, and clothes its sturdy twigs with unmistakable horse-chestnut leaves and pyramids of white flowers. Sometimes these are tinted with rose, and the tree is very beautiful. The brown nuts are irregular in shape and enclosed in somewhat pear-shaped, two-valved husks.
This western buckeye follows the borders of streams from the Sacramento Valley southward; they are largest north of San Francisco Bay, in the canyons of the Coast Range.
Shrubby, red-flowered buckeyes, often seen in gardens and in the shrubbery borders of parks, are horticultural crosses between the European horse-chestnut and a shrubby, red-flowered native buckeye that occurs in the lower Mississippi Valley.
THE LINDENS, OR BASSWOODS
This tropical family, with about thirty-five genera, has a single tree genus, tilia, in North America. This genus has eighteen or twenty species, all told, with representatives in all temperate regions of the Northern Hemisphere, with the exception of Central America, Central Asia, and the Himalayas.