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FOC | Family List | FOC Vol. 11 | Simaroubaceae | Ailanthus

1. Ailanthus triphysus (Dennstedt) Alston in Trimen, Handb. Fl. Ceylon. 6(suppl.): 41. 1931.

岭南臭椿 ling nan chou chun

Adenanthera triphysa Dennstedt, Schlüssel Hortus Malab. 32. 1818; Ailanthus malabarica Candolle.

Trees, evergreen, usually 15-20(-45) m tall. Leaves pinnate, 30-60 cm; leaflets 6-17(-30) pairs; petiolule pubescent, 5-7 mm; blades ovate-lanceolate or oblong-lanceolate, 15-20 × 2.5-5.5 cm, thinly leathery, base broadly cuneate or slightly rounded, oblique, margin entire, apex acuminate, abaxially ± shortly pubescent or glabrous. Panicles axillary, ± shortly pubescent, 25-50 cm; bracts small, ovate or deltoid, 5-7 mm, early caducous. Pedicel ca. 2 mm. Calyx abaxially pilose, 5-lobed, lobes shorter than 1 mm, deltoid, as long as tube. Petals 5, glabrous or nearly so, ca. 2.5 × 1-1.5 mm, valvate. Stamens 10, inserted at base of disk; filaments gracile, curved and folded in buds, lower part pilose, 1-3 mm in females, 3-6 mm in males; anthers ca. 1 mm in male, shorter in female. Carpels 3, glabrous, 2-2.5 mm; styles free or connate at base; stigmas 3-lobed, lobes shield-shaped, ca. 2 mm wide. Samarium 4.5-8 × 1.5-2.5 cm, both tops slightly obtuse. Seeds flat, surrounded by wing. Fl. Oct-Nov, fr. Jun-Mar.

Montane regions, sparse or thick woods, roadsides; below 100-600 m. Fujian, Guangdong, Guangxi, S Yunnan [India, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam].


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