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''Alstonia scholaris'' (Apocynaceae, commonly called Blackboard tree, Indian devil tree, Ditabark, Milkwood pine, White cheesewood and Pulai (Bengali:ছাতিম; Assamese:চতিয়না); syn. ''Echites scholaris'' L. Mant., ''Pala scholaris'' L. Roberty) is an evergreen, tropical tree native to the Indian subcontinent and Indomalaya, Malesia and Australasia. == Description == The ''Alstonia scholaris'' is a glabrous tree and grows up to 40 m tall, its mature bark is grayish and its young branches are copiously marked with lenticels. The upperside of the leaves are glossy, while the underside is greyish.〔http://www.stuartxchange.org/Dita.html retrieved on 29 June 2007〕 Leaves occur in whorls of 3-10; petioles are 1–3 cm; the leathery leaves are narrowly obovate to very narrowly spathulate, base cuneate, apex usually rounded; lateral veins occur in 25-50 pairs, at 80-90° to midvein. Cymes are dense and pubescent; peduncle is 4–7 cm long. Pedicels are usually as long as or shorter than calyx. The corolla is white and tube-like, 6–10 mm; lobes are broadly ovate or broadly obovate, 2-4.5 mm, overlapping to the left. The ovaries are distinct and pubescent. The follicles are distinct and linear. Flowers bloom in the month October. The flowers are very fragrant similar to the flower of ''Cestrum nocturnum''. Seeds of ''A. scholaris'' are oblong, with ciliated margins, and ends with tufts of hairs 1.5–2 cm.〔http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200018323 retrieved on 29 June 2007〕 The bark is almost odourless and very bitter, with abundant bitter and milky sap. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alstonia scholaris」の詳細全文を読む スポンサード リンク
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