Trees, deciduous, up to 20 m tall; bark smooth and straightly grained. Branches with pith, yellow or yellow-brown pubescent when young, then glabrescent. Leaves odd-pinnate, 40-60 cm; petiole 7-13 cm; leaflets 13-27, opposite or nearly so; blades ovate-lanceolate, abaxially dark green, adaxially gray-green, smelly when rubbed. Panicles 10-30 cm. Flowers light green; pedicel 1-2.5 mm. Sepals 5, imbricate, 0.5-1 mm. Petals 5, 2-2.5 mm, base hispid. Stamens 10; filaments densely hispid basally, longer than petals in males, shorter than petals in females; anthers oblong, ca. 1 mm. Carpels 5; styles connate; stigmas 5-lobed. Samarium oblong, 3-4.5 × 1-1.2 cm. Seed in middle of wing, flat-globose. Fl. Apr-May, fr. Aug-Oct.
"Rapidly growing tree with few branches and coarse twigs; lvs large, to 1 m; lfls 11–41 (the terminal one often imperfectly developed or wanting), narrowly oblong, entire except for one or more coarse teeth near the base, each tooth with a large gland beneath; infl pyramidal, 1–3 dm; fls greenish or greenish-yellow, 5 mm wide; frs 3–5 cm × 7–13 mm, twisted; 2n=80. Native of e. Asia, often escaped from cult. in our range, especially in cities. (A. glandulosa)"
A large polygamous tree, upto 30 m high or more. Leaves large, 30-40 cm or more long. Leaflets upto 12 cm long, 2.5-4 cm broad, alternate, ovate-lanceolate, usually cordate at base, glabrous except the veins and midrib near the base, with 2-4 coarse teeth, each with a large gland beneath, margin almost entire. Petiolules 2-10 mm long; midrib prominent. Inflorescence panicle, 10-30 cm long. Bracts minute. Flowers c. 7.0 mm across. Calyx 5-lobed, unequal, sepals much smaller than petals, c. 1 mm long and 0.5 mm broad, valvate, joined at the base, margin serrulate, glabrous, ovate, acuminate. Petals spreading, c.3 x 1.5 mm, glabrous, hairy at the base. Staminate flower with 10 stamens, filaments c. 3 mm long, arising from the base of small 10- lobed disc; anthers 2-celled, dehiscing longitudinally. Pistillate flower: ovary deeply divided, ovule solitary in each cell. Fruit samara, 3.5-5 cm long, twisted at the top, light reddish brown.
Strauch oder bis 25 m hoher Baum. Blätter meist unpaarig gefiedert, 40–60(–90) cm lang, mit 4–12 Fiederpaaren. Teilblätter bis 10 cm lang, lanzettlich, zugespitzt, ganzrandig, am Grund oft asymmetrisch und mit einigen drüsigen Zähnen. Blü
Tree or shrub, up to 25 m high; suckers profusely; dioecious. Stems with young branches reddish brown. Leaves imparipinnate; 300-600(-1000) mm long; petiolate; rachis erect, but leaflets tend to droop; leaflets ovate, apices acute to acuminate, margins toothed at base, each tooth with a sessile gland. Flowers: male flowers in axillary cymes on long pedicels, female flowers solitary on long pedicels; calyx 5-parted, sepals 5; petals 5, often very similar to sepals, elliptic, each with a fleshy gland at base, yellowish green; Sep.-Dec., Apr.-Jun. Fruit a samara.