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

5. Ailanthus altissima (Miller) Swingle, J. Wash. Acad. Sci. 6: 495. 1916.

臭椿 chou chun

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.

● Found in many habitats; 100-2500 m. All regions of China except Hainan, Heilongjiang, Jilin, Ningxia, Qinghai [widely cultivated and naturalized elsewhere].


1 Samarium 5-7 × 1.4-1.8 cm.   5c var. sutchuenensis
+ Samarium 3-4.5 × 0.7-1.2 cm   (2)
       
2 (1) Samarium 1-1.2 cm wide.   5a var. altissima
+ Samarium 0.7-0.8 cm wide.   5b var. tanakae

Lower Taxa


 

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