Alstonia occurs as far flung genus of evergreen trees and shrubs from the dogbane personal (Apocynaceae). It was known as by Robert Brown in 1811, after Charles Alston (1685-1760), Professor of botany at Edinburgh from 1716-1760.

A nature and severity mintage Alstonia scholaris (L.) R.Br. was originally known as Echites scholaris by Linnaeus in 1767.

Description
Alstonia consists of astir 40-60 species (according to different authors), indigene to tropical & semitropical Africa, Central America, southeast Asia, Polynesia and New South Wales, Queensland and North Australia, with virtually all metal money in the Malesian area.

These trees may develop super big, like a Alstonia pneumatophora, recorded by using the height of Sixty m & the across of extra than Ii m. Alstonia longifolia is the simply coinage growing inside Central Usa (principally bush, however likewise trees Xx m high).

A leatherlike, sessile, elementary leaves are elliptical, ovoid, linear or even lancelike & wedge-cuneiform at a base. the leaf blade is dorsiventral, medium-sized to big & discarded oppositely or even within a whorl & using entire margin. the leaf venation is pinnated, by owning many veins ending inside a marginal vein.

A inflorescence is terminal or axillary, consisting of thyrsiform cymes or compound umbels. A microscopic, roughly fragrant flowers are white, yellowness, pink or even green & funnel-shaped, growing in the pedicle & subtended by bracts. It consist of Little phoebe petals and Quintet sepals, arranged inside foursome whorls. A fertile flowers come hermaphroditic. A gamosepalous green sepals consist of ovoid lobes, & come distributed within 1 whorl. A circinate disk is hypogynous. A 5 gamesepalous flower petal keep close at h& oblong or even ovoid lobes and come discarded inside of these whorl. A corolla lobes overlapping to the left (like The. rostrata) or even to the best (like The. macrophylla) in the bud. A ovary has 2 separate follicles by having glabrous or even ciliated, oblong seeds that develop into deep blue podlike, schizocarp fruit, between 7-40 cm long. the plants contain a whitish sap, rich in poisonous alkaloids. A Alstonia macrophylla is normally known inside Sri Lanka as 'Havari nuga' or a 'wig banyan' because of its distinct flower that looks rather the woman's hanker wig.

Alstonia trees come utilized within traditional medicine. A bark of the Alstonia constricta and the Alstonia scholaris is a source of a guide against malaria, toothache, rheumatism & snake bites. A latex is used inside dealing with coughs, throat sores & fever.

Numbers of Alstonia metal money come commercial timbers, known as pule or even pulai inside Indonesia & Malaysia. Trees from either a part Alstonia create lightly timber, when victims from either a sections Monuraspermum & Dissuraspermum make heavily timber.

Alstonia trees come far flung & mostly non endangered. Nonetheless two or three metal money may be uncommon, like The. annamensis, The. beatricis, The. breviloba, The. stenophylla & The. guangxiensis.

Species
Alstonia has 5 distinct sections, for each one the monophyletic group; Alstonia, Blaberopus, Tonduzia, Monuraspermum, Dissuraspermum. Alstonia actinophylla (A.Cunn.) K.Schum. - Milkwood Alstonia acuminata Miq. Alstonia annamensis ( Monach. ) K.Sidiyasa AlstoniThe angustifolia A.DC. Alstonia balansae Guillaumin Alstonia beatricis K.Sidiyasa Alstonia boonei De Untamed. Alstonia boulindaensis Boiteau Alstonia brassii Monachino Alstonia breviloba K.Sidiyasa Alstonia calophylla Miq. Alstonia comptonii S.Moore Alstonia congensis Engl. Alstonia constricta F.Muell. - Bitterbark, Quinine Tree, Australian Fever Bark Alstonia coriacea Pancher & S.Moore Alstonia costata R.Br. Alstonia cuneata Wall. & G.Don Alstonia curtisii King & Gamble Alstonia deplanchei Van Heurck & Müll.Arg. Alstonia duerckheimianan Schltr. Alstonia edulis G.Benn. Alstonia elliptica J.W.Moore Alstonia esquirolii H.Lév. Alstonia eximia Miq. Alstonia ficifolia S.Moore Alstonia filipes Schltr. outmoded Guillaumin Alstonia fragrans J.W.Moore Alstonia gilletii De Untamed. Alstonia glabriflora Markgr. Alstonia godeffroyi Reinecke Alstonia grandifolia Miq. Alstonia guangxiensis D.Fang & X.X.Chen Alstonia henryi Tsiang Alstonia iwahigensis Elmer Alstonia kurzii Hook.f. Alstonia lanceolata Van Heurck & Müll.Arg. Alstonia lanceolifera S.Moore Alstonia legouixiae Van Heurck & Müll.Arg. Alstonia lenormandii Van Heurck & Müll.Arg. Alstonia linearifolia Guillaumin Alstonia linearis Benth. Alstonia longifolia (The.DC.) Pichon Alstonia longissima F.Muell. Alstonia macrophylla Wall. antique G.Don - Batino, Devil Tree Alstonia mairei H. Léveillé Alstonia marquisensis M.L.Grant ex Fosberg & Sachet Alstonia micrantha Ridl. Alstonia mollis Benth. Alstonia mt Turrill Alstonia muelleriana Domin - Jackapple, Leatherjacket, Milky Yellowwood Alstonia neriifolia D.Don. Alstonia oblongifolia Merr. Alstonia odontophora Boiteau Alstonia pachycarpa Merr., Chun & Tsiang Alstonia pangkorensis King & Gamble Alstonia parvifolia Merr. Alstonia paucinervia Merr. Alstonia paupera (equivalent word of The. mairei) Alstonia penangiana K.Sidiyasa Alstonia plumosa Labill. Alstonia pneumatophora Angel passee L.G.Den Berger Alstonia polyphylla Miq. Alstonia quaternata Van Heurck & Müll.Arg. Alstonia reineckeana Lauterb. Alstonia retusa S.Moore Alstonia roeperi Van Heurck & Müll.Arg. Alstonia rostrata C.E.C.Fischer Alstonia rubiginosa K.Sidiyasa Alstonia rupestris Kerr Alstonia saligna S.Moore Alstonia scholaris (L.) R.Br. - Pali-mari, Dita Bark, Bitter Bark, Milkwood, Milky Bean, Milky Pine Alstonia sericea Blume Alstonia setchelliana Christoph. Alstonia smithii Markgr. Alstonia somersetensis F.M.Bailey Alstonia spathulifolia Guillaumin Alstonia spatulata Blume Alstonia spectabilis R.Br. - Poele Bark, Jackapple, Leatherjacket, Milklike Yellowwood Alstonia sphaerocapitata Boiteau Alstonia stenophylla Guillaumin Alstonia subsessilis Miq. Alstonia twahigensis Alstonia undulata Guillaumin Alstonia undulifolia K.M.Kochummen & K.M.Wong Alstonia venenata R.Br. Alstonia verticillosa F.Muell. Alstonia vieillardii Van Heurck & Müll.Arg. Alstonia villosa Blume Alstonia vitiensis Seem. Alstonia yunnanensis Diels

Reference
[http://www.tropenbos.nl/docs/nwl17.pdf Recent taxonomy of Alstonia] (pdf file). Kade Sidiyasa. Taxonomy, phylogenesis, & wood anatomy of Alstonia (Apocynaceae). 230 pp. Blumea, Suppl. Xi (1998), ISBN 90-71236-35-8. (Awarded sustaining a Engler Ribbon per International Association for Plant Taxonomy) Kade SidiyasThe, A., Trio, 1992. The monograph of Alstonia (Apocynaceae). Forster, Paul I personally. - The taxonomical revision of Alstonia (Apocynaceae) inside Australia (1992)