Origin and Production. The roots of Aristolochia Serpen-taria, L. as well as those of A. reticulata, Nutt. are official in the U. S. Pharmacopoeia as Serpentaria. Not only are the roots of the two plants similar, both as to external appearance and as to action, but the two oils resemble each other as well.

Upon distillation, the root of Aristolochia Serpentaria, L. yields 1 to 2 p.c. of a light brown oil, the odor of which resembles that of valerian, and reminds one, besides, of ginger. d15o 0,961 to 0,990; aD + 21 to +26°; nD20o1,4972 to 1,4980; A.V. 2 to 3; E. V. 65 to 80; E. V. after acetylation 105 to 115. Soluble in 15 to 20 vol. of 80 p.c. and in 0,5 vol. and more of 90 p.c. alcohol.

According to M. Spica2), borneol has been found as principal constituent.

Upon the distillation of small amounts of Aristolochia reticulata, Nutt. J. C. Peacock3) obtained but 0,61 to 0,94 p.c. of oil of a golden-yellow color and a camphor- and valerian-like odor; d15,5o 0,974 to 0,978; aD - 4°.

1) Journ. of the pharm. Soc. of Japan 11)07, 361; Report of Schimmel & Co. October 1907, 15.

2) Gazz. chim. ital. 17 (1887), 313; Jahresb. f. Pharm. 1887, 45.

3) Americ. Journ. Pharm. 63 (1891), 257.

The oil contains a terpene boiling at 157°, probably pinene, also borneol which occurs as the ester of an acid not yet identified (possibly tiglic acid?).