Haematox'ylon campechia'num, Hematoxylon, Logwood, N.F. -- The heartwood with not more than 2 p.c. of foreign organic matter. C. America, nat. In W. Indies. Spreading tree, 7.5-12 M. (25-40 degrees) high, .3-.6 M. (1-2 degrees) thick, knotty, tough; bark dark, rough, white dotted; leaves paripinnate, leaflets 4-5 pairs, obcordate, smooth; flowers yellow, racemes, jonquil odor; fruit legume, 2.5-4 Cm. (1-1 3/5') long, compressed, tapering ends, 2-seeded. Heartwood in logs 1 M. (3 degrees) long, 15 Cm. (6') thick, sp. gr. 1.06, hard purplish-black, internally brownish-red, irregular concentric circles, medullary rays 4 cells wide; odor faint, agreeable; taste sweetish, astringent; colors saliva dark pink. In shops as small chips, occasionally in billets, coarse powder, reddish-brown, freshly cut surface dark yellowish-red. Powder, reddish-brown -- wood fibers, crystal-fibers with calcium oxalate monoclinic prisms, tracheae with brownish amorphous content; medullary rays, walls of cells with simple pores; pieces with a greenish luster (fermentation or oxidation of hematoxylin into hematein by ammonia in the air) should be rejected. It imparts a yellowish color to slightly acidified water, changed to purple or violet-red by alkalies (red with Brazil wood, no change with red saunders); solvents: boiling water, alcohol; contains hematoxylin 12 p.c., volatile oil, tannin, fat, resin, asah 3.5 p.c. There are four varieties: 1, Campeachy; 2, Honduras; 3, St. Domingo; 4, Jamaica. Astringent, tonic, antiseptic, similar to tannin; cholera infantum, chronic diarrhea, dysentery, leucorrhea, hemorrhage, dyspepsia; antiseptic in gangrene, ulcers, cancer; chiefly in dyeing violet, blue, gray, black. Dose, 3ss-1 (2-4 Gm.); 1. Extractum Haematoxyli, 10 p.c. (water), dose, gr. 5-15 (.3-1 Gm.); decoction (Br.) 5 p.c. + cinnamon 1, 3ss-2 (15-60 cc.).