Delft-grass, Cymbopogon polyneuros, Stapf (Andropogon polyneuros, Steud.; A versicolor, Nees; A. Schcenanthus var. versicolor, Hack.; A. nardoides B minor, Nees ex Steud.)3), which is characterized by its anise- or fennel-like odor, occurs in the southwestern part of India proper, more particularly in the Nilgiris where it replaces C. Martini. It also occurs in Ceylon, mostly at higher altitudes (up to 1500 m.); furthermore in the island of Delft in Adam's Straits, hence the name "Delft-grass". It constitutes a good fodder for horses. The oil was first distilled in 1902 in Ootakamund with a yield of 0,25p.c. According to a report from the Imperial Institute4) four samples of oil were distilled later by Jowitt in Bandarawela, Ceylon, from this species of grass. The yields varied from 0,20 to 0,34. The properties of these oils were determined by S. S. Pickles, of London. The distillates had a yellowish to reddish-brown color and a peculiar sweetish odor, very different from that of citro-nella and lemongrass oils: d15o 0,936 to 0,951; aD +30o53' to + 55° 15'. Each of the four oils was soluble in 1 vol. of 80p.c. alcohol, but the solutions became opalescent upon the addition of 10 vols. The amount of acetylizable constituents (total geraniol) varied from 38,7 to 51,8 p.c. computed as C10H18O, but no tests were made as to whether the oils contained alcohols or not. Further statements concerning the composition of the oils are wanting.
1) Dymock, Warden and Hooper, Pharmacographia indica, Part VI, p. 564.
2) Report of Schimmel & Co. April 1892, 59.
3) O. Stapf, Kew Bull. 1906, 345.
4) Bull. Imp. Inst. 8 (1910), 144; 10 (1912), 30.