Guayacan Blanco: indigenous; 30 to 35 feet in height; slender, strong and compact; light yellow color; grows on black lands; especially useful for carriage and wagon spokes; Sp. Gr. 0.79.
Humus: indigenous; hard compact and tough; blood red in color; fine carpentry and cabinet work; furnishes a dye; Sp. Gr. 0.84.
Jiqui: indigenous; 50 to 60 feet in height; 3 feet diameter; strong, hard, durable, dark brown in color; found in all soils; used for supports, posts, channel stakes and stakes for boundary lines; never rots in swamp land; makes good charcoal.
Jucaro Prieto: two varieties; indigenous; 60 to 75 feet in height; four feet in diameter; all over Island; very strong; impervious to rot in swampy and bad lands; used for wagon and carpenter work; especially adapted for pilings.
Jucaro Amarillo: indigenous; 30 to 35 feet in height; slender; all over the Island; strong and compact, yellow color, especially adapted for posts and wagon axles; Sp. Gr. 1.13.
Jacaranda: indigenous; 45 to 55 feet in height; strong, tough and resistant; yellowish grey; carpenter and furniture work; Sp. Gr. 0.89.
Jagua: indigenous; 30 to 35 feet in height; 18 inches in diameter; found all over Island; strong, elastic and durable; yellow in color; adapted for carriage work, moulds, lances, etc.
Jatia: indigenous; 25 to 30 feet in height; 16 inches in diameter; found in eastern end of Island; strong, hard and compact; dark yellow; used in cabinet work and canes; Sp. Gr. 0.94.
Jayajabico: indigenous; small tree, found in Pinar del Rio; hard, tough and compact; light chestnut color; used in carriage work, cabinet work, canes, etc.; Sp. Gr. 1.12.
Lebrisa: indigenous; 25 to 30 feet in height; eastern end of the Island; strong and resistant; yellowish color; adapted for axles, tillers, and general carpenter work; Sp. Gr. 1.00.