View source for Ptelea

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Ptelea (Greek name of the elm tree, transferred to this genus on account of the similarity of the fruits). Rutaceae. Hop Tree. Ornamental woody plants grown for their handsome foliage and also for their attractive light green fruit.

Deciduous shrubs or small trees: lvs. alternate, exstipulate, 3-5-foliolate; lfts. entire or crenulate, punctate with pellucid dots: fls. small, polygamous, in terminal corymbs; lobes of the minute calyx, petals and stamens 4-5; ovary flattened, 2-celled, with short style: fr. a 2-seeded, indehiscent, small, flattened nut, furnished usually with a broad thin wing.—Usually 5 to 7 species distributed from Lake Ont. to Fla. and N.Mex. are recognized, but recently about 60 species have been distinguished by Greene. Bark and foliage are sometimes used medicinally and emit (as well as the frs.) when bruised, a strong, pungent odor resembling somewhat that of the hop, for which the frs. are said to have been used as a substitute—hence the name hop tree.

The hop trees are ornamental shrubs or small round- headed trees with long-petioled leaves and greenish white flowers, followed by flattened usually broadly winged and nearly orbicular fruits. The one species chiefly cultivated is hardy North—if it proves tender, as it sometimes does, it is probably raised from southern seed—and is a small round-headed rather loosely branched tree with glossy green foliage, adorned in fall with numerous clusters of light green fruits which form a pleasing contrast with the dark green foliage and remain on the branches for some time after the leaves have fallen. It thrives best in a porous moderately moist soil and prefers a somewhat shaded position. Propagation is by seeds sown in fall; the varieties by layers or by grafting in spring under glass or budding in summer on seedlings of the type.
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==Cultivation==
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===Propagation===
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==Species==
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==Gallery==
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==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->

==External links==
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