Distyly and cryptic heteromorphic self-incompatibility in Mussaenda macrophylla (Rubiaceae) Self-pollination in buds and homostyly in Mussaenda shikokiana (Rubiaceae), a monomorphic species in a distylous clade Mussaenda lancipetala X. F. Deng & D. X. Zhang, a new species of Rubiaceae from China A New Variety of Mussaenda pubescens Ait.f. New Taxa of Mussaenda Linn. from China Reproductive isolation between sympatric sister species, Mussaenda kwangtungensis and M. pubescens var. alba Pre- and post-zygotic reproductive isolation between co-occurring Mussaenda pubescens var. alba and M. shikokiana (Rubiaceae) A New Species of Mussaenda from Mountain Emei,Sichuan Three new synonyms in Mussaenda (Rubiaceae) from China Three new species of the Rubiaceae from Guangxi, China Character displacement in Mussaenda pubescens(Rubiaceae) Mussaenda longipetala , A Newly Recorded Species of Mussaenda ( Rubiaceae ) from China Identification of plants in Mussaenda L. based on DNA barcoding