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Published In: Memoirs of the Wernerian Natural History Society 1: 75. 1811. (Mem. Wern. Nat. Hist. Soc.) Name publication detail
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: S. NAZIMUDDIN AND M. QAISER
General/Distribution: A genus with about 30 species, distributed in tropical Africa, Asia, Australia and Polynesia, represented in Pakistan by two cultivated species.

 

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Trees or shrubs with usually whorled branches. Leaves generally whorled. Inflorescence paniculate or corymbose terminal cymes. Flower salverform. Calyx short, 5 lobed; glands lacking inside. Corolla 5-lobed with cylindric tube, hairy only at the mouth. Stamens 5, included, inserted in the corolla tube, with lanceolate anthers. Disc of various shapes, annular, truncate or lobed. rarely absent. Ovules many in each carpel, multiseriate; style filiform; stigma short or 2 toothed. Follicles 2, cylindrical; seeds many, oblong or linear, usually hairy.
 

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1 Leaves with 30-60 pairs of lateral nerves. Corolla lobes pubescent out side, overlapping to the left in bud 2 Alstonia scholaris
+ Leaves with 15-20 pairs of lateral nerves. Corolla lobes glabrous out side, overlapping to the right in bud 1 Alstonia macrophylla
 
 
 
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