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has long been a doubtful point whether or not two species exist, producing the green and black teas. True, there are the green-tea country and the black-tea region, hundreds of miles apart; but the latest investigation goes to prove that there is really but one plant. Mr. Robert Fortune, whose recent and interesting work, "The Tea Countries of China and India," is familiar to many of our readers, has not only had peculiar facilities for gaining a knowledge of tea as grown in the Central Flowery Kingdom, but is, moreover, one of the most scientific of English botanists. He maintains the "unity theory" of the plant, and we are content to agree with him,--the differences in the leaves being owing to climate, situation, soil, and other accidental influences. The shrub is generally from three to six feet high, having numerous branches and a very dense foliage. Its wood is hard and tough, giving off a disagreeable smell when cut. The leaves are smooth, shining, of a dark green color, and with notched edges; those of the _Thea Bohea_, the black tea, being curled and oblong,--while those of the _Thea viridis_, the green tea, are broader in proportion to their length, but not so thick, and curled at the apex. The plant flowers early in the spring, remaining in bloom about a month; and its seeds ripen in December and January. According to Chinese authority, tea is grown in nearly every province of the empire; but the greater part of it is produced in four or five provinces, affording all that is shipped from Canton. Very large quantities, however, are consumed by the countries adjoining the western frontier, and Russia draws an immense supply by caravans, all of which is the product of the northwest provinces. The Bohea Hills, in Lat. 27° 47' North, and Long. 119° East, distant about nine hundred miles from Canton, produce the finest kinds of black tea; while the green teas are chiefly raised in another province, several hundred miles farther north. The soil of many plantations examined by Mr. Fortune is very thin