Spiradiclis danxiashanensis (Rubiaceae), a new species from South China

Abstract

Spiradiclis danxiashanensis, a new species segregated from S. guangdongensis, is described and illustrated. The morphological description of S. guangdongensis is emended accordingly. Both species are Chinese endemics and a conservation assessment to each of them is provided using IUCN guidelines.

Spiradiclis tubiflora (Rubiaceae), a new cave-dwelling species from southern China

“…There are approximately 53 Spiradiclis species worldwide, most representatives being herbs and occurring in limestone areas (Chen and Taylor 2011, Deng et al 2014, Wang et al 2015, Wen et al 2015, Wu et al 2015a, 2015b, 2016, 2019, Wang 2016a, 2016b, Pan et al 2016, 2019, Liu et al 2018). China is the diversity centre of Spiradiclis with 47 species being recorded and most of them distributed in Guangxi and Yunnan provinces of south-western China (Lo 1999, Chen and Taylor 2011, Liu et al 2018, Pan et al 2019).…”

Spiradiclis quanzhouensis sp. nov. (Rubiaceae) from a limestone area in Guangxi, China

“…It is a poorly known, species-rich genus of perennial, rosular herbs, erect herbs or subshrubs found in China, Myanmar, Vietnam, Bhutan, India and Indonesia (Chen and Taylor 2011). Spiradiclis taxa usually have cymose or paniculiform inflorescences with heterostylous 5-merous flowers (Deng et al 2014, Wang et al 2015. According to recent taxonomic studies, Spiradiclis comprises at least 50 species, most of grow in favor karst caves or shaded hill cliffs in secondary forests (Deng et al 2014, Wang et al 2015, Wu et al 2015a, b, Wang 2016a, usually in association with ferns and species of Gesneriaceae, Begoniaceae and Loganiaceae (Wen et al 2015).…”

Spiradiclis pengshuiensis (Ophiorrhizeae, Rubioideae), a new species from Chongqing, China

“…The genus comprise about 50 species and ca. 91% species can be found in China, the center of species diversity (Chen and Taylor 2011, Deng et al 2014, Wang et al 2015, Wen et al 2015, Wu et al 2015, Wang 2016). Spiradiclis species are usually similar to Ophiorrhiza L. because of their similar inflorescence and flower characters, but the former is characterized by globose or ovoid (vs. strongly laterally compressed in Ophiorrhiza ) capsules.…”