Ivy, a genus of plants belonging to the pentandria class; and in the natural method giving name to the 46th order, *Hederaeae*. See BOTANY Index.

HEDERACEÆ (from *hedera*, "ivy"), the name of the 46th order in Linnæus's fragments of a natural-method, consisting of ivy, and a few other genera, which from their general habit and appearance seem nearly allied to it. See BOTANY Index.

HEDGES, in Agriculture, are either planted to make fences round enclosures, or to divide the several parts of a garden. When they are designed as outward fences, they are planted either with hawthorn, crabs, or black-thorn; but those hedges which are planted in gardens, either to surround wilderness quarters, or to screen the other parts of a garden from sight, are planted according to the fancy of the owner; some preferring evergreens, in which case the holly is best; next the yew, then the laurel, laurustinus, phyllrea, &c. Others prefer the beech, the hornbeam, and the elm. See AGRICULTURE and GARDENING.