Spiradiclis liboensis (Rubiaceae), a new species from limestone mountain areas in Guizhou, China

Abstract

Spiradiclis liboensis L. Wu & W. J. Liu, a new species in tribe Ophiorrhizeae of Rubiaceae from limestone mountain areas of Guizhou, south-western China, is described and illustrated. It is similar to S. guangdongensis and S. jingxiensis, but differs from the latter two by the following traits: stipule triangular, inflorescence sessile or with peduncle up to 0.5 mm long, pedicel 0.8–2.2 mm long, corolla white, salverform, corolla tube 1.6–2.2 cm long, corolla tube of long-styled morph inside with a villous ring and stigmas positioned at the throat of the corolla tube. The conservation status is assessed as “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.

Ophiorrhiza paralatiflora (Rubiaceae), a new species from limestone areas in Guangxi, China

“…Morphologically, the genus is readily distinguished from the closely related genus Spiradiclis Blume by its laterally compressed and obcordate capsules with two valves (Lo 1999, Chen and Taylor 2011, Wu et al 2018). These two genera represent the first and the second largest genera within the tribe Ophiorrhizeae ( Spiradiclis , ca 60 species) (Rydin et al 2009, Song et al 2022). However, recent phylogenetic research has suggested to integrate Spiradiclis into Ophiorrhiza .…”