Astronium

Astronium Jacq.

Description:
Dioecious trees with clear contact dermatitis-causing exudate; bark sometimes with exfoliating patches. Leaves deciduous, alternate, imparipinnate, petiolate; leaflets opposite (alternate), petiolulate; cataphylls sometimes present. Inflorescences terminal and/or axillary thyrsoids. Flowers pedicellate, articulate; perianth 5-parted, imbricate; calyx larger in female flowers; corolla greenish white or yellowish and turning pink with age; androecium haplostemonous; stamens alternating with petals and lobes of disk; pistillode 0; staminodes  reduced; disk glabrous, 5-lobed, very thin; carpels 3; styles 3, recurved; stigmas capitate; ovule apical. Fruit fusiform, glabrous baccate or nutlet-like, wind dispersed by accrescent, chartaceous sepals, often with persistent styles, 1-locular; mesocarp resinous; endocarp thin, brittle when dry. Seed with straight embryo. n=15.

Seven or more species in Mexico south to Paraguay and northern Argentina.

Original Publication: Astronium Jacq., Enum. Syst. Pl.: 10 (1760)

Bibliography: F. A. Barkley, Phytologia 16: 107–152 (1969), rev.

Web Links:
PlantSystematics.org
Tropicos – Astronium
The Plant List – Astronium