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Published In: Histoire de l'académie royale des sciences; avec les mémoires de mathématique & de physique 1786 (Mém.): 265–271, pl. 8. 1788. (Hist. Acad. Roy. Sci. Mém. Math. Phys. (Paris, 4to)) Name publication detail

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: KAMAL A. MALIK
General/Distribution: A small genus of c. 5 species (Nooteboom, Fl. Males. I (6): 215. 1962), chiefly distributed in Asia and Australia. In Pakistan it is represented by two cultivated species.


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Dioecious or sometimes polygamous, large trees with pithy thick bark and distinct leaf-scars. Leaves alternate, large, imparipinnate or paripinnate; leaflets opposite or ± opposite, oblique, entire or toothed, with glands on the underside of the teeth; stipules absent. Inflorescence an axillary panicle. Flowers unisexual, 5 (-6)-merous, actinomorphic. Disc 10-lobed or entire, annular, cupular or elongated. Calyx 5 (-6)-lobed, lobes equal, imbricate. Petals as many as sepals, oblong to narrowly oblong, concave, imbricate or valvate in bud. Stamens 10 in male flowers, 5-6 in bisexual flowers (but with sterile anthers) or vestigial or absent; anthers oblong. Ovary superior, of 2-5 free carpels, flat, 5-locular, placentation axile, ovules solitary in each locule, anatropous; styles as many as carpels, free or connate; pistillode in the male flowers vestigial or absent. Fruit an oblong-lanceolate or linear samara. Seeds flat, orbicular or obovate or ± triangular, exalbuminous.

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1 Leaves glandular beneath, entire except the 2-4 coarse teeth at the base. Samara twisted at the top 1 Ailanthus altissimus
+ Leaves irregularly glandular toothed. Samara twisted at the base 2 Ailanthus excelsus
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