L'identité et la typification de Cynorkis arnottioides Rchb.f. (Orchidaceae) sont discutées; cette espèce a été auparavant confondue avec Amphorkis inermis Thouars et Arnottia mauritiana A.Rich. Le matériel original conservé à l'herbier Reichenbach à Vienne démontre qu'elle en est distincte, mais en revanche identique à Cynorkis paradoxa (Frapp. ex Cordem.) Schltr. La nomenclature est clarifiée et une nouvelle lectotypification proposée. L'histoire complexe de l'herbier de Reichenbach et sa configuration sont expliquées. Received: 7 April 2025; Accepted: 4 February 2026; First published online: 17 June 2026
Two new species of Annonaceae bearing unique or unusual morphologies are described and illustrated from Papua New Guinea. Goniothalamus metadoxus Ezedin, from the Papuan Peninsula, exhibits an extraordinary reduction of the outer petals resulting in an inverted floral morphology where the inner petals appear larger and more prominent. It is further distinguished by its long pedicels, inner petals bearing a densely sericeous indument giving a silvery-white sheen, and long apiculate staminal connectives that are pinkish-lavender in color. Uvaria chrysoflora Ezedin, from the Sepik River basin, is unique in bearing greenish-yellow flowers, making it the first non-red flowered species of its genus from Papuasia. It most closely resembles the widespread U. concava Teijsm. & Binn. and can be further distinguished from the latter by its smaller leaves and larger flowers. Received: 23 October 2025; Accepted: 20 April 2026; First published online: 17 June 2026
Four new species of Grewia L. (Malvaceae, Grewioideae) from southwest Madagascar are described and illustrated here. They all belong to section Grewia, subgenus Grewia. In the 1970s, three of these species were already annotated as new to science by René Capuron and then David Mabberley described them in the 2000s but they were never validly published. A fourth species is now recognized and it is also formally described in this article: G. rufoarenosa Ramon & Phillipson. This new species is known only from a small area north of the town of Toliara on the red sands of the Ranobe (PK 32 Protected Area). It is characterized by pink flowers that turn bluish as they fade, and has a particularly low number of stamens compared to other species, rhombic leaf blades with crenate to broadly-toothed margins and large, glabrous, four-lobed fruits. The descriptions of the new species are accompanied by a preliminary assessment of their status according to the IUCN Red List Categories and Criteria. Received: 19 February 2025; Accepted: 5 February 2026; First published online: 17 June 2026
