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of the triangle we come to the maple family; most of the 

 maples are trees, so they must be looked for in the arboretum, 

 but here are specimens of the Ginnala maple, from northern 

 China and Japan. Immediately beyond this is the bladder- 

 nut family, represented by species of the bladder-nut (Sta- 

 phylea), both from the New and the Old World, 

 lowing the path to the west, we come to the buckeye family, 

 represented here by the small-flowered buckeye, from the 

 southeastern United States ; many of the buckeyes and horse- 

 chestnuts are trees, and are grown in the arboretum, 

 lowing this is the soapberry family, with the genus Can- 

 thoceras, a native of China, as a representative. At some 

 distance from the path to the left is the buckthorn family 

 the most familiar plant here is the New Jersey tea, or red 

 root, of eastern North America ; its leaves have been used as 

 a substitute for tea, and it is said that the industry is being 

 revived in Pennsylvania; the jujube-tree, an inhabitant of the 

 Mediterranean region and temperate Asia, is of this family, 

 its edible fruit oval in shape and about the size of a plum, 

 with an acid taste when fresh; the Dahurian buckthorn, 

 growing wild from central Asia to the Amur region, and the 

 purging buckthorn of Europe, the berries of which are 

 medicinal, are here; from the juice of the ripe fresh berries 

 of the purging buckthorn, mixed with alum, is made the pig- 

 ment, known as sap-green or bladder green, used by water- 

 color artists. The mallow family, further along the path, 

 is represented by two specimens of the rose-of-Sharon {Hibis- 

 cus syriacus), from western Asia, and often found escaped 

 from cultivation in the eastern United States; many her- 

 baceous representatives of this family may be found at the 

 herbaceous grounds. Near the mallow family is the tea 

 family, represented by the mountain Stuartia, from the 

 southeastern United States; other members of the tea family, 

 including the tea plant and the common camellia, may be 

 found in the conservatories. Also near the mallows may be 

 found the St. John's-wort shrubs {Hypericum), with their 

 showy yellow flowers. Farther on, where the path bends to 



