(Greek dis, twice and pteron wing: the fruit consists of two winged carpels). Aceraceae. Ornamental deciduous tree with handsome large pinnate foliage.

Leaves opposite, petioled, odd-pinnate, with 9-15 serrate leaflets: flowers polygamous, small, in large terminal panicles; sepals 5, longer than the short and broad petals; staminate flowers with usually 8 stamens and a rudimentary ovary in the center; pistillate flowers with a 2-celled compressed ovary; style cylindric with 2 slender recurved stigmas: fruit consisting of 2 1-seeded compressed nutlets connate only at the base and with the wing extending all around. - Two species in Cent, and S. W. China.

The species in cultivation is a small tree with handsome foliage, insignificant flowers, but conspicuous winged fruits in large panicles. It is apparently not hardy North. It grows well in any good soil. Propagation is by seeds.


Oliver. Tree, to 30 ft.: leaves 3/4- 1 1/2 ft. long; leaflets 9-15, short-petioled, the upper nearly sessile, the lowest pair sometimes 3-parted, ovate-lanceolate to lanceolate, long-acuminate, coarsely serrate, glabrous or sparingly hairy, 2-4 in. long: panicles loose, 6-12 in. long; flowers whitish, minute, slender-pedicelled: each carpel (samara) of the fruit broadly obovate or nearly orbicular, light brown, about 1 in. long, with the seed near the middle. June; fruit in Sept. Cent. China. J.H S. 28:60. H.I. 19:1898. Alfred Rehder.