. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 574 The Hop Trees I. THREE-LEAVED HOP-TREE — Ptelea trifoliata Linnseus Occurring from Ontario to Florida, Minnesota, Kansas and Texas as a well- known shrub under various names, such as Shrubby trefoil, Whahoo, Quinine tree. Sang tree. Hop ash. Stinking ash, Water ash. Wafer ash, and Wing seed, this rarely becomes a tree meters tall, with a trunk diameter of 2 dm. It has a rather disagreeable odor. The trunk is slend
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 574 The Hop Trees I. THREE-LEAVED HOP-TREE — Ptelea trifoliata Linnseus Occurring from Ontario to Florida, Minnesota, Kansas and Texas as a well- known shrub under various names, such as Shrubby trefoil, Whahoo, Quinine tree. Sang tree. Hop ash. Stinking ash, Water ash. Wafer ash, and Wing seed, this rarely becomes a tree meters tall, with a trunk diameter of 2 dm. It has a rather disagreeable odor. The trunk is slender, the branches spreading, forming a round top. The bark is about 3 mm. thick, smooth or nearly so and dark gray. The twigs are slender, finely hairy when young, soon becoming smooth, shining, dark brown and marked by prominent leaf scars. The winter buds are very small, nearly round and whitish. The leaves are 3-foliolate with a petiole 6 to cm. long; leaflets sessile, ovate or ellip- tic-oblong, I to dm. long, usually taper-pointed, rounded or narrowed at the base, mostly entire on the margin, the terminal one largest and more gradually tapering toward the base; they are hairy when unfolding, smooth at maturity and dark green and somewhat shining above, paler, smooth or hairy and prominently veined beneath. The flowers ap- pear from March to Jime, according to latitude, the sterile and fertile flowers borne in the same clusters, their pedicels slender, very hairy or nearly smooth; petals ovate-oblong, 3 to 5 mm. long; ovary slightly hairy. The fruit is about cm. in diameter, roimded or notched at the base, hanging on the slender pedi- cels and persisting well into the winter. The wood is hard, close-grained, yellowish brown and satiny; its specific gravity is about The bark of the root is sparingly used as a bitter tonic and the ripe fruit is said to be used as a substitute for hops. The plant is often seen in cultivation, where its bright foliage and buf
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