Trigonostemon is a plant genus of the family Euphorbiaceae and the sole member of its tribe (Trigonostemoneae). It was first described as a genus in 1826. It is native to Southeast Asia, southern China, the Indian Subcontinent, Queensland, and a few islands in the western Pacific. Species • # Trigonostemon adenocalyx - Vietnam • # Trigonostemon albiflorus - Thailand, Guangxi • # Trigonostemon angustifolius - Philippines • # Trigonostemon apetalogyne - W New Guinea • # Trigonostemon aurantiacus - Andaman & Nicobar Is, Thailand, Malaysia, Sumatra, Java, Myanmar • # Trigonostemon beccarii - Sumatra • # Trigonostemon birmanicus - Myanmar • # Trigonostemon bonianus - Vietnam, Yunnan • # Trigonostemon capillipes - Thailand, Borneo, W Malaysia, Surigao • # Trigonostemon capitellatus - Laos, Vietnam • # Trigonostemon carnosulus - W Malaysia • # Trigonostemon cherrieri - New Caledonia • # Trigonostemon chinensis - Vietnam, S China • # Trigonostemon cochinchinensis - Vietnam • # Trigonostemon croceus - W Malaysia • # Trigonostemon detritiferus - Brunei • # Trigonostemon diffusus - Sarawak • # Trigonostemon diplopetalus - Sri Lanka • # Trigonostemon dipteranthus - Sumatra • # Trigonostemon eberhardtii - Vietnam • # Trigonostemon elegantissimus - Borneo • # Trigonostemon elmeri - Sabah • # Trigonostemon everettii - Philippines • # Trigonostemon filiformis - Luzon • # Trigonostemon flavidus - Hainan, Laos, Myanmar, Thailand • # Trigonostemon fragilis - Guangxi, Hainan, Vietnam • # Trigonostemon gaudichaudii - Vietnam • # Trigonostemon hartleyi - Papua New Guinea • # Trigonostemon heteranthus - Myanmar, Thailand, W Malaysia, Borneo, Sumatra • # Trigonostemon hirsutus - Philippines, Sabah, Sarawak • # Trigonostemon howii - Hainan, Vietnam • # Trigonostemon hybridus - Cambodia • # Trigonostemon inopinatus - Queensland • # Trigonostemon ionthocarpus - Sabah, Sarawak • # Trigonostemon kerrii - Thailand • # Trigonostemon laetus - Myanmar • # Trigonostemon laevigatus - Andaman Is.,Indochina, Philippines, Borneo, Sumatra • # Trigonostemon lanceolatus - Myanmar • # Trigonostemon laoticus - Laos • # Trigonostemon laxiflorus - Philippines • # Trigonostemon longipedunculatus - Philippines, Borneo • # Trigonostemon longipes - Philippines • # Trigonostemon magnificus - Sumatra • # Trigonostemon malaccanus - W Malaysia, N Sumatra • # Trigonostemon matangensis - Sarawak • # Trigonostemon matanginsu - Sarawak • # Trigonostemon merrillii - Philippines, Sabah • # Trigonostemon murtonii - Thailand, Vietnam • # Trigonostemon nemoralis - SW India, Sri Lanka • # Trigonostemon nigrifolius - Myanmar • # Trigonostemon oblanceolatus - Philippines • # Trigonostemon pachyphyllus - S Thailand • # Trigonostemon pentandrus - W Malaysia • # Trigonostemon philippinensis - Philippines, Borneo, Sumatra • # Trigonostemon phyllocalyx - Thailand, Vietnam • # Trigonostemon pierrei - Phú Quốc Island • # Trigonostemon poilanei - Vietnam • # Trigonostemon polyanthus - Philippines, Borneo • # Trigonostemon praetervisus - N Bangladesh • # Trigonostemon quocensis - Cambodia, Vietnam, Thailand, Myanmar • # Trigonostemon reidioides - Cambodia, Vietnam, Thailand, Myanmar, Laos • # Trigonostemon rubescens - Laos, Cambodia • # Trigonostemon rufescens- W Malaysia • # Trigonostemon salicifolius - Selangor • # Trigonostemon sandakanensis - Sabah • # Trigonostemon sanguineus - Vietnam • # Trigonostemon semperflorens - Assam, Bangladesh • # Trigonostemon serratus - Bali, Java • # Trigonostemon sinclairii - W Malaysia • # Trigonostemon stellaris - Vietnam • # Trigonostemon stenophyllus - Luzon • # Trigonostemon sunirmalii - Myanmar • # Trigonostemon thorelii - Laos • # Trigonostemon thyrsoideus - S China, Indochina • # Trigonostemon tuberculatus - Yunnan • # Trigonostemon verrucosus - Java • # Trigonostemon verticillatus - S Thailand, W Malaysia, Sumatra • # Trigonostemon villosus - W Malaysia, Sumatra, Borneo, Nicobar Is • # Trigonostemon viridissimus - Assam, Andaman Is, W Malaysia, Sumatra, Myanmar, Bali • # Trigonostemon voratus - Fiji • # Trigonostemon wenzelii - Leyte • # Trigonostemon wetriifolius - W Malaysia • # Trigonostemon whiteanus - Philippines • # Trigonostemon xyphophylloides - Hainan moved to other genera (Cleidion Croton Dimorphocalyx Omphalea Paracroton Wetria ) • # T. arboreus - Omphalea malayana • # T. asahanensis - Dimorphocalyx muricatus • # T. beddomei - Dimorphocalyx beddomei • # T. bulusanensis - Dimorphocalyx bulusanensis • # T. cumingii - Dimorphocalyx cumingii • # T. forbesii - Wetria insignis • # T. lawianus - Croton lawianus • # T. macrophyllus - Paracroton pendulus • # T. oliganthus - Cleidion papuanum • # T. zeylanicus - Paracroton pendulus subsp. zeylanicus