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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 pigment, known as sap-green or 
bladder green, used by water-color artists. Close to this 
is the linden family, represented by the genus Grewia. 
The mallow family, further along the path, is represented 
by specimens of the rose-of-Sharon (Hibiscus syriacus), 
from western Asia, and often found escaped from cultiva- 
tion in the eastern United States; many herbaceous repre- 
sentatives 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 south- 
eastern 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 the left, is the tamarix family, represented by 
several species of tamarix, Old World plants. Next comes 
the mezereon family, having as a representative the 
leather-wood or moose-wood (Dirca), of the eastern parts 
of North America; the name leather-wood refers to the 
very tough inner bark; the bark is a violent emetic; the 
daphnes are of this family, and here will be found the 
garland-flower, the spurge flax, and the Chinese daphne. 
Some distance from the path and opposite the Woodlawn 
Road entrance, is the oleaster family, including several 
species of oleaster, the buffalo berry and the sea-buckthorn, 
a native of Europe, the berries of which are acrid and poi- 
sonous; the berries of several of the species of oleaster are 
edible; the buffalo berry, of northwestern North America, 
is largely eaten by the Indians of that region; the berries 
of the oriental oleaster, known as Trebizond dates, are 
made into cakes by the Arabs, after having been dried. 
Plants of the ginseng family form a group opposite the 
