Acilepis nakhonphanomensis (Asteraceae), a new species from Northeastern Thailand.

Acilepis nakhonphanomensis Chatan & Promprom, a new species in the Sunflower family (Asteraceae) from northeastern Thailand, is described and illustrated. It mainly differs from other previously known similar Acilepis species by the receptacle, leaf blade margin, involucre, floret, corolla tube, anther, style, and achene. Colour illustrations, line drawings, distribution map, and morphological comparisons with its allied species are provided. The conservation status of the new species was also assessed. [ABSTRACT FROM AUTHOR]