808 



second year the plantation will give from 30,000 to 35,000 kilos, 

 of roughly skaken roots which after washing will 3aeld about 

 2 J tons of cleaned marketable product; this weight in bales 

 amounts to about 16 cubic metres, which at Marseilles or 

 Bordeaux is worth about 720 francs per ton (Perfumery & Ess. 

 Oil Record, Feb. 20th 1913, p. 42). 



The yield of oil from the dry root is 0-4r-0-9 per cent. (Kew 

 Bull. 1906, p. 362). Owing to the low volatility and great 

 viscosity of the oil, distillation is very tedious, each charge 

 being in the still from 12-16 hours; the production of 1 kilo 

 is estimated to cost 20 francs and with the average selHng price 

 at 30 francs this yields a profit of 10 francs per kilog. or 260 francs 

 per hectare (Perfumery & Ess. Oil Rec. I.e.). 



Ref. — Andropogon muricatus " in Diet. Econ. Prod. India, 



Watt, 1. 1889, pp. 245-247. " Oil of Vetiver," in The Volatile 



Oils, Gildemeister & HofEmann, pp. 289-291. " Vetiveria 



zizanioides," Stapf, in Kew Bull. 1906, pp. 346-349 ; pp. 362-363. 



" Vetiveria zizanioides " in Comm. Prod. India, Watt, 



p. 1106 (John Murray, London, 1908). " Oil of Veti-vert," 



in The Chemistry of Essential Oils, Parry, pp. 184-186. 



" Vetiver," in the Perfumery & Essential Oil Record, iv. 

 Feb. 20th, 1913, p. 42; " Oil of Vetivert or Cuscus grass (Khas 



Khas)," I.e. June 11th 1915, p. 168. "Tropical Sweet Grass 



in Trinidad," in Journal of the Royal Society of Arts, Ixix. 

 Jan. 28th, 1921, p. 161. "Vetiver Oil from India," Bull. 



Inst 



Amphilophis, Nash. 



Amphilophis glabra, Stapf 



III. 



{A ndropog< 



m (Ualziel, No. 257, Herb. Kew), B.E. Africa 

 Beig 



in 



buted in Tropical Asia; found in N.E. Australia and 

 Madagascar. 



Yields a quantity of feed during the summer months, 

 Australia (Maiden, Useful, Nat. PI. Austr. p. 73 — Andropogon 

 intermedin s , R. Br.). 



A perennial with culms 3 ft. high and upwards, 



Amphilophis intermedia, Stapf; Fl. Trop. Afr. IX. p. 174, 



(1) var. acidula, Stapf, I.e. [Andropogon pertusus, Stapf, Kew 



BuU. 1895, p. 209]. 



Gold Coast, Cape Verde Islands, Angola, Barbados, Nevis, 

 and Guiana. 



A perennial, 3 ft. high and upwards, propagated by division 

 of the root. A fodder plant cut at the early flowering stage; 

 yield m Barbados, where it is called " Sour Grass," 5-7 tons per 

 acre per annum. It is recommended for dry hmestone soils, 

 for grazing or cut for hay, fed to cattle alone or mixed ^\'ith a 

 little molasses and oil-cake. The appearance of pastures in 



