The Cyperus margaritaceus–niveus complex (Cyperaceae) is a group of nine C4 Cyperus species ( C. karlschumanii , C. kibweanus , C. ledermannii , C. margaritaceus , C. nduru, C. niveus var. leucocephalus , C. somaliensis , C. sphaerocephalus , and C. tisserantii ) from Sub-Saharan Africa and Madagascar united by the combination of a capitate inflorescence, white–yellow glumes and swollen bulb-like bases. Previous molecular stud...

Summary The name Cyperus atronervatus subsp. angustifolius was not validly published due to the omission of a Latin diagnosis. The name is validly published here.

Summary Ctenium bennae Xanthos is described and illustrated as the only rheophytic species in the genus. The new species is known from a single waterfall on the Benna Plateau, at the border between Forecariah and Kindia Prefectures in Guinea Conakry. Ctenium bennae is here assessed as Near Threatened according to the categories and criteria of IUCN.