Spiradiclis cavicola L. Wu, Hareesh & B. Pan, a new species from limestone caves in Guizhou and Guangxi province, southwestern China, is described and illustrated. This species which is morphologically similar to S. scabrida, can be easily distinguished from the latter by its petiole 0.5–3 cm long, leaf blade elliptic to oblong, and flower homostylous that with anthers and stigma are positioned at the throat of corolla tube or sometimes stigma slightly above anthers. The detailed morphological characters together with illustrations, diagnostic comparisons and habitat etc. are presented.

Bo Pan, Rong-Hui Tu, Vadakkoot-Sankaran Hareesh and Lei Wu. 2019: Spiradiclis cavicola (Rubiaceae), A New Species from Limestone Caves in southwestern China. Annales Botanici Fennici. 56(1-3); DOI:  10.5735/085.056.0101