It has many handsome buildings, and its residential streets are shaded with live-oaks, water oaks and bitter-orange trees.
The bitterness is imparted by such substances as bitter orange rind, gentian, rhubarb, quassia, cascarilla, angostura, quinine and cinchona.
The lemon is really grown upon a bitter orange tree, grafted to bear the lemon.
Oranges and lemons, excluded from the plateau by the severity of the Winter cold, are grown in great quantities on the plains of Andalusia and all round the Mediterranean coast; the peel of the bigarade or bitter orange is exported to Holland for the manufacture of curacao; and figs, almonds, pomegranates, carobs and other southern fruits are also grown abundantly in all the warmer parts, the first two even in central Spain and the more sheltered parts of the northern maritime provinces.
Chen-pi, or Bitter Orange Peel, comes from the peel of the Mandarin orange.