Monier-Williams: A Sanskrit-English Dictionary (p. 1149)
m. 7-leaved, a kind of tree, MW.; Alstonia scholaris, MBh.; Kāv.; Suśr.; (ā) f. id., MW.

Monier-Williams: A Sanskrit-English Dictionary (p. 1149)
mfn. 7-leaved W.; m. Alstonia scholaris MBh. Hariv. R. &c.; (ī) f. Mimosa pudica Suśr.; n. the flower of Alstonia scholaris ŚārṅgP.; a sort of sweetmeat, L.

Tamil Lexicon, University of Madras (p. 568)
ēḻilappālai: 1. Seven-leaved milk plant, m. tr., Alstonia scholaris

Tamil Lexicon, University of Madras (p. 2631)
pālai: 01 1. Arid, desert tract; 2. Aridity, barrenness; 3. Burning-ground; 4. Temporary separation of a lover from his sweetheart; 5. Ironwood of Ceylon; 6. Woolly ironwood; 7. Indian guttapercha; 8. Wedge-leaved ape-flower; 9. Silvery-leaved apeflower, m. tr. Mimusops kauki ; 10. Seven-leaved milk-plant; 11. Conessi-bark; 12. Mango-like cerbera; 13. Blue-dyeing rosebay; 14. Woolly dyeing rosebay; 15. India-rubber vine; 16. Brazilian nutmeg, l. tr. Cryptocarya wightiana ; 17. Green wax flower; 18. A specific melody-type; 19. A kind of lute; 20. A group of melodies, of which there are seven classes; 21. The 7th nakṣatra ; 22. The 5th nakṣatra; 23. A symbolic word used in dice-play
02 1. Girl; 2. Child; 3. A young woman under 16 years of age; 4. The period up to the 16 year in the life of a woman; 5. Śiva-Śakti

Dymock, Warden, Hooper: Pharmacographia Indica (vol. II, pp. 386-388)
Alstonia scholaris, Apocynaceae
The tree is called in Sanskrit Saptaparna, Sapta-chhada, Guchha-pushpa, Vrihat-tvak and Vishala-tvak, "having large or thick bark." Hindu physicians describe it as tonic, alterative, and useful in fever, skin diseases, and dyspepsia. Suśruta gives the following formula for use in catarrhal dyspepsia: -"Take of the bark of Alstonia, stems of Tinospora cordifolia, bark of Azadirachta indica, and the bark of Betula Bhojpatra, equal parts, in all two tolas (320 grains), and prepare a decoction in the usual way." It also enters into the composition of several prescriptions for boils and other diseases of the skin. The specific name scholaris has been given to this tree from the fact of its planks, covered with a layer of sand, being used as school-boards on which children trace their letters as in the Lancastrian system. The natives of Western India have a superstitious fear of it, and say that it assembles all the trees of the forest once a year to pay homage. (Graham.)
Rheede in 1678 and Rumphius in 1741 described and figured the tree and noticed the medicinal use of the bark by the natives along with salt and pepper in febrile dyspepsia, and as a local application to ulcers and rheumatic joints. Rumphius's experience is, that the bark is useful in catarrhal dyspepsia and in the febrile state consequent upon that affection, and also for enlarged spleen. He says: "Of its value in catarrhal dyspepsia I can speak from experience; the dose should be 15 grains taken at bedtime in powder or decoction." Nimmo in 1839 conrtibuted a short, but interesting, account of the drug to the Pharmaceutical Journal (xii., p. 422). Alstonia bark is official in the Pharmacopoeia of India, and is described as an astringent tonic, anthelmintic, and antiperiodic. In the Concan the juice of the fresh bark with milk is administered in leprosy, and is also prescribed for dyspepsia and as an anthelmintic; and the juice of the leaves with that of fresh ginger root or zedoary is administered to women after confinement. One of us has found the tincture of the bark to act in certain cases as a very powerful galactogogue: in one case the use of this drug was purposely discontinued at intervals, and on each occasion the flow of milk was found to fail.
In 1874 Gruppe, an apothecary of Manilla, obtained from the bark a substance which he named ditain. In the report on the Centennial Exhibition presented to the American Pharmaceutical Association (Transactions 1877), the following account of this substance and of the use of the drug in Manilla is given: -"Echites scholaris (Alstonia scholaris, Brown), grows wild abundantly in the central provinces of the island of Luzon, where it has long been known and esteemed by the natives under the name of 'Dita,' as most efficient tonic and febrifuge. The people having been in the habit of using it from time immemorial in decoction against malignant, intermittent, and remittent fevers with the happiest result, the attention of our leading physicians was excited, and the active principle ditain has now become a staple article, and ranks equal in therapeutical efficiency with the best imported sulphate of quinine. Numberless instances of private and hospital practice, carried out by our best physicians, have demonstrated this fact. Equal doses of ditain and of standard quinine sulphate have had the same medicinal effects; besides leaving none of the disagreeable secondary symptoms, such as deafness, sleeplessness, and feverish excitement, which are the usual comitants of large quinine doses, ditain attains its effect swiftly, surely, and infallibly.
We use ditain generally internally in quantities of half a drachm daily for children, and double the dose for adults, due allowance being made, of course, for age, sex, temperament, &c. We derive very beneficial effects from its use, too, under the form of poultices. Powdered dita bark, cornflour, each half a pound; hot water sufficient to make a paste. Sprean on linen and aplly under the armpits, and in the wrists and ankles, taking care to renew when nearly dry, and provided the desired effects should not have been obtained. The results arrived at by ditain in our Manilla hospitals and private practice are simply marvellous. In our military hospital and penitentiary practice, ditain has perfectly superseded quinine, and it is now being employed with most satisfactory results in the Island of Mindanao, where malignant fevers are prevalent."