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Ophiorrhizeae is a group in the coffee family Rubiaceae, subfamily Rubioideae. It contains about 360 species in 4 genera only found in tropical and subtropical Asia and the Pacific region. Some species of the group contain camptothecin, an alkaloid used to make chemotherapeutic agents (cancer chemotherapy).
Today's species was found in the Pengshui County, China already in 2013. However, at that time there wasn't enough material for a thorough morphological observation and comparison. Therefore, researchers went back in the following years and successively collected the vouchers during the flowering and fruiting seasons.
For the experts: Spiradiclis pengshuiensis Bo Pan & R. J. Wang (Rubiaceae) is described as a new species from Chongqing in SW China. It is morphologically compared with S. pauciflora L. Wu & Q. R. Liu because of their similarities in habit, pubescent surface, small leaf laminas and subglobose capsules. Its conservation status is evaluated as “VU” according to the IUCN categories and criteria.