(from Greek, hair and seed). Limonia § Chaetospermum, Roemer. Rutdcesae, tribe Citreae. A small spiny tree, proposed as a stock for citrus fruits.

Chaetospermum bears hard-shelled fruits: leaves persistent, trifoliate: flowers pentamerous with 10 free stamens; ovary 8-10-celled, with numerous ovules in each cell; cells filled with spongy vesicular tissue; seeds hairy, the cotyledons aerial in germination: first foliage leaves opposite. - Only one species is known.

glutinosa, Swingle (Limonia glutinosa, Blanco. AEgle decdndra, Naves. AEgle glutinosa, Merrill). Tabog. Fig. 890. Petioles margined; lateral leaflets small, sessile, scarcely one-third as long as the terminal one; spines slender, straight, sharp, axillary usually in pairs in the axils of the leaves: flowers rather large, occurring singly, or in few-flowered clusters on long slender pedicels in the axils of the leaves: fruit oblong, 2-3 x 1 1/2 in. with a thick leathery rind longitudinally ribbed, 8-10-celled; it contains numerous flattened hairy seeds, 3/8 to3/16in. immersed in a watery tissue. Native to the Isl. of Luzon, Philippine Archipelago. 111. Blanco., Flower Filip. ed. Ill, pi. 124. Vidal y Soler, Sinop. de fam. Fil. pl. 25. Bull. Soc. Bot. fruit 58, Mem. 8d. pl. 5. - The tabog is a rapid-growing tree when young, and in a warm greenhouse shows a vigorous root-growth. This species is being tested as a stock for use in commercial citriculture. Experiments have shown that oranges, lemons, grapefruits and kumquats grow well when budded or grafted on young tabog plants.

Walter T. Swingle.

Chaetospermum glutinosa. (X 1/2)

Fig. 890. Chaetospermum glutinosa. (X 1/2)