1. Plants(Common Noun) Alstonia scholaris is a small tree that grows up to 40 m tall and is glabrous. The bark is greyish; branchlets are copiously lenticellate.The upperside of the leaves are glossy, while the underside is greyish. 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. এবিধ একেলগে সাতোটা পাত হোৱা গছ৷

English: Alstonia scholaris,
Assamese: চতীয়না

2. Tree(Common Noun-Neuter) an evergreen, tropical tree native to the Indian subcontinent and Southeast Asia; Scientific name: Alstonia scholaris. ভাৰত উপমহাদেশ আৰু দক্ষিণ-পূৱ এছিয়াত উপলব্ধ এবিধ চিৰসেউজ উদ্ভিদ; বৈজ্ঞানিক নামঃ এলষ্ট’নিয়া স্কলাৰিচ।

English: Alstonia scholaris, Blackboard tree, Ditabark, Indian devil tree, Milkwood pine, White cheesewood,
Assamese: চতিয়না, বহুপৰ্ণী, সপ্তচ্ছদ, সপ্তপত্ৰ, সপ্তপৰ্ণ, সপ্তপৰ্ণী,
Mising: singgir