The Genus Gynura (Asteraceae: Senecioneae) in Thailand

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THAI JOURNAL OF BOTANY 1(1): 25–36. 2009. FQBIQB=C HGQI4Ba6A 1(1): 25–36. 2552. The genus Gynura (Asteraceae: Senecioneae) in Thailand ONGKARN V ANIJAJIVA * Biological Program, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, 10220, Thailand. ABSTRACT . A taxonomic study of the genus Gynura Cass. in Thailand is presented. Ten taxa were enumerated, namely Gynura procumbens (Lour.) Merr., G. calciphila var. calciphila Kerr, G. calciphila var. dissecta F.G. Davies, G. integrifolia Gagnep., G. pseudochina (L.) DC., G. nepalensis DC., G. hmopaengensis H. Koyama, G. cusimbua (D.Don) S. Moore, G. bicolor (Roxb. ex Willd.) DC. and G. sp . KEYWORDS : Gynura , Compositae, revision, taxonomy , Thailand. INTRODUCTION MATERIALS AND M ETHODS The genus Gynura Cass. (Asteraceae- This study is based mainly on herbarium Senecioneae) comprises 44 species and is materials from AAU, BK, BKF, BM, distributed from tropical Africa to South CMU, E, G, K, KEP, KKU, KYO, KUN, L, and East Asia and Australasia with one MJG, P, PSU, QBG, S, SING and TEX species in tropical Australia (Vanijajiva & (abbreviations according to Holmgren & Kadereit, submitted). The highest specific Holmgren, 1998). Field observations in diversity is found in Southeast Asia continental Southeast Asia, mostly Thailand, (Davies, 1981), but the genus is least well were made from September to December understood particular in Thailand (Davies, 2004, January to February 2005 and March 1978; Koyama, 1988). In the absence of to April 2006. extensive fieldwork, the account presented here for Thailand can at best be regarded as TAXONOMIC TREATMENT provisional. GYNURA Cass. in F. Cuvier, Dict. Sci. Nat. 34: 391.1825, nom. cons . Lectotype (designated by Davies 1978: 335): Gynura * Corresponding author: [email protected] divaricata (L.) DC. = Gynura auriculata Received: 29 May 2009 Accepted: 20 June 2009 Cass. — Gynaecura Hassk., Cat. Hort. .

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The Significance of Abiotic Control on Gynura Procumbens (Lour.) Merr Herbs in Malaysia for Better Growth and Secondary Metabolite Enrichment
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