* EUCALYPTUS TREES. 257 
Asia, One of the annual tall Sorghums. It ripens 
its seeds in three or four months from the time of sow- 
ing, the produce in good soil being often upward of 
one hundredfold. It is a wholesome grain. 
Andropogon Calamus, Royle.—Central India. The 
Sweet Calamus of the ancients. From this species 
the Gingergrass-oil of Nemaur is distilled, an article 
much used in perfumery. 
Andropogon cernuus, Roxb. (Sorghum cernuum, 
Willd.)—One of the Guinea corns, India, where it 
is much cultivated, and so also in other tropical coun- 
tries. It is perennial, and forms the ‘staff of life of 
the mountaineers’? beyond Bengal. It reaches a 
height of 15 feet, with leaves over 3 feet long. The 
thick stems are rooting at the lower joints, and cattle 
are very fond of them. ‘The grain white. - The 
specific limits of the various sorghums are not well 
ascertained. 
Andropogon citratus, Candolle.—The Lemon Grass 
of India. It yields an essential oil for perfumery ; 
besides it is occasionally used for tea. This applies 
as well to Andropogon Nardus, L., and some allied 
grasses. 
Andropvgon Haleppensis, Sibthorp.—South Europe, 
Orient. A rich perennial grass, cultivated often un- 
der the name of Cuba Grass. 
Andropogon Ivarancusa, Roxb.—One of the fra- 
grant grasses of North India, much used, like A. She- 
nanthus. 
Andropogon Martini, Roxb, (A. flexuosus, Nees.) 
—QOn the mountains of India. The fragrant citron- 
ella oil is distilled in Ceylon and elsewhere from the 
leaves of this species, General Martin ob’erved that 
48 
