OLACACEiE — AUEANTIACEiE. 453 



• 

 1 lb. of Green Hyson Tea gave 72 grains pure -white Theine, and 2 colonred 



= 74 grains or 1'05 p.c. 

 8 oz. Black Congou gave 34'5 gr. pure, and 1 '5 impure = 36 gr. or 1 '02 p. o. 

 6 oz. of Black Assam Tea yielded 36 gr. or 1 '37 p. o. 

 1 lb. of a cheap Green Tea, called Twankay, gave 69 gr. or 0'98 p.c. 



In 1874, the imports of tea into the United Kingdom amounted 

 to 142,068,524 lbs., of which 127,323,630 lbs. were retained forborne 

 consumption. The tea plant is now largely cultivated in India, 

 especially at Darjeeling and Saharunpore. The genus Gamellia is 

 prized on account of its showy flowers. There are numerous culti- 

 vated varieties of Camellia japonica, many of which can endure the 

 climate of Britain when trained on a wall with a southern exposure, 

 or slightly protected. In China, Camellia Sasanqua, or Sasanqua tea, 

 is cultivated on account of its flowers, which are said to impart frar 

 grance and flavour to other teas. Camellia oleifera yields a valuable 

 oil. Souari or Butter Nuts are the produce of Garyocar butyrosum. 

 The flowers of Marcgravia are occasionally furnished with bracts, which 

 are folded, and united so as to form ascidia. The stem, root, and 

 leaves of Marcgravia umiellata are regarded in the West Indies as 

 diuretic. The leaves of Freziera theoides are used as tea in Panama. 



Order 33. — Olacace^, the Olax Family. {Polypet. Hypog) 

 Calyx small, gamosepalous, entire or toothed, often becoming finally 

 large and fleshy; aestivation imbricated. Petals 3-6, hypogynous, 

 free, or adhering in pairs by means of the stamens ; aestivation val- 

 vate. Stamens hypogynous, some fertile, others sterile ; the former 

 3-10, alternate with the petals, the latter opposite to the petals ; 

 filaments compressed; anthers innate, bUocular, with longitudinal 

 dehiscence. Ovary 1-3-4 celled; ovules 1-3, pendulous from a cen- 

 tral placenta; style filiform; stigma simple. Fruit fleshy, indehis- 

 cent, often surrounded by the enlarged calyx, unilocular, monospermal. 

 Seed anatropal, pendulous; albumen copious, fleshy; embryo small, 

 at the base of the albumen. — Trees or shrubs, with simple, alternate, 

 exstipulate leaves, which are, however, sometimes abortive. They are 

 chiefly tropical or subtropical — being found in the East Indies, New 

 Holland, and Africa. One only is known in the West Indies. A few 

 are from the Cape of Good Hope. Little is known in regard to their 

 properties. Olax zeylanied has a fetid wood with a saline taste, and is 

 employed in putrid fevers ; its leaves are used as a salad. There are 36 

 genera and 170 species enumerated. Examples — Olax, Opilia, Icacina. 



Order 34. — Aurantiace^, the Orange Family. {Polypet. Hypog.) 

 Calyx urceolate or campanulate, short, 3-5 toothed, withering. Petals 

 3-5, broad at the base, sometimes slightly coherent ; aestivation 

 imbricated. Stamens equal in number to, or a multiple of, the 

 petals ; filaments flattened at the base, distinct or combined into one 

 or more parcels ; anthers erect. Thalamus enlarged in the form of a 



