Two new species of Xylopia (Annonaceae) from peninsular Thailand


  • David M. Johnson Department of Botany and Microbiology, Ohio Wesleyan University, Delaware, Ohio 43015 USA.
  • Nancy Murray Department of Botany and Microbiology, Ohio Wesleyan University, Delaware, Ohio 43015 USA.



Annonaceae, South-East Asia, tree diversity, taxonomy, Magnoliales


Two previously undescribed species of Xylopia are documented from southern Thailand. Xylopia niyomdhamii is known from a small peat swamp area in Narathiwat Province. Xylopia microcalyx is restricted to the limestone region extending from Chumphon south to Trang and Phatthalung Provinces, an area with many other endemic Annonaceae species. We found that X. malayana s.s., although previously reported, is not present in the Thai flora. A key to X. malayana s.s. and the Thai species of Xylopia is presented to summarize our taxonomic changes.


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How to Cite

Johnson, D. M., & Murray, N. (2019). Two new species of Xylopia (Annonaceae) from peninsular Thailand. Thai Forest Bulletin (Botany), 47(2), 264–269.