A revision of the genus Ruagea (Meliaceae: Melioideae) Terence D. PenningtonAmy BarkerBlanca M. Rojas-Andres OriginalPaper Open access 11 November 2021 Pages: 565 - 604
Astronium woodii (Anacardiaceae), a new species from Bolivia Daniel VillarroelMaira T. Martinez-UgartecheBente B. Klitgaard OriginalPaper 15 October 2021 Pages: 605 - 611
Antonio A. de Porlier y Sopranis, 1st Marquis of Bajamar (1722 – 1813) and the genus Porlieria (Zygophyllaceae) — honouring his botany advocacy, and its nomenclature C. A. ZanottiA. Santos-GuerraJ. Francisco-Ortega Original Article 26 November 2021 Pages: 613 - 623
Neea campanulata (Nyctaginaceae: Pisonieae), a new species from humid forests, Pará State, Brazil Daniel da Silva CostaElson Felipe Sandoli RossettoMário Henrique Terra-Araujo Original Article 10 November 2021 Pages: 625 - 631
Myriostoma herrerae sp. nov. (Geastrales: Basidiomycota) and a new record of M. calongei from Mexico Laura Guzmán-DávalosAlma Rosa Villalobos-ArámbulaVirginia Ramírez-Cruz OriginalPaper 30 September 2021 Pages: 633 - 644
Clusia falcata (Clusiaceae), an endangered species with exceptionally narrow leaves endemic to Chiapas, Mexico Manuel LujánN. Ivalú CachoBarry Hammel Original Article Open access 11 December 2021 Pages: 645 - 650
A new endemic species of Sesuvium (Aizoaceae: Sesuvioideae) from the Caribbean Basin, with further notes on the genus composition in the West Indies Alexander P. SukhorukovAlexander N. SennikovPavel Hanáček Original Article 29 November 2021 Pages: 651 - 674
Challenges of applying monophyly in the phylogenetic shallows: taxonomic reappraisal of the Dactylorhiza maculata group Richard M. Bateman OriginalPaper Open access 04 November 2021 Pages: 675 - 704
Four new threatened species of Rinorea (Violaceae), treelets from the forests of Cameroon Gaston AchoundongXander van der BurgtMartin Cheek Original Article Open access 08 November 2021 Pages: 705 - 719
The endemic plant species of Mt Kupe, Cameroon with a new Critically Endangered cloud-forest tree species, Vepris zapfackii (Rutaceae) Martin CheekJean Michel Onana Original Article Open access 18 November 2021 Pages: 721 - 734
Kupeantha yabassi (Coffeeae-Rubiaceae), a new Critically Endangered shrub species of the Ebo Forest area, Littoral Region, Cameroon Maria G. Alvarez-AguirreMartin CheekBonaventure Sonké Original Article Open access 05 November 2021 Pages: 735 - 743
Ctenium bennae (Poaceae; Chloridoideae), a new rheophytic species from Guinea-Conakry Martin XanthosGbamon KonomouXander M. van der Burgt Original Article Open access 03 November 2021 Pages: 745 - 750
The genus Tristachya (Poaceae: Panicoideae) in Madagascar Maria S. VorontsovaNantenaina H. Rakotomalala OriginalPaper Open access 25 November 2021 Pages: 751 - 760
Thilachium madagascariense (Capparaceae), a new species from eastern Madagascar with a key to the species of the genus Silvio Fici OriginalPaper Open access 30 September 2021 Pages: 761 - 766
A revision of Ziziphus (Rhamnaceae) in Borneo Daniel CahenJessica RickenbackTimothy M. A. Utteridge OriginalPaper Open access 10 November 2021 Pages: 767 - 804
Taxonomy and morphology of Thalictrum (Ranunculaceae) in New Guinea Renata BorosovaTimothy M. A. UtteridgeAndré Schuiteman OriginalPaper Open access 17 September 2021 Pages: 805 - 817
Gymnema wiyadae (Apocynaceae: Asclepiadoideae), a new species from eastern Thailand Aroonrat Kidyoo Original Article 18 November 2021 Pages: 819 - 825
A Strobilanthes (Acanthaceae) miscellany John R. I. WoodR. W. Scotland Original Article Open access 07 December 2021 Pages: 827 - 840
Reinstatement and lectotypification of Uraria pulchra (Leguminosae-Papilionoideae) Jahnabi GogoiTikam Singh Rana Original Article 18 November 2021 Pages: 841 - 847
Correction to: Reinstatement and lectotypification of Uraria pulchra (Leguminosae-Papilionoideae) Jahnabi GogoiTikam Singh Rana Correction 27 December 2021 Pages: 849 - 849
Identity and taxonomic status of Canscora diffusa var. tetraptera (Gentianaceae) Arun Prasanth R.Ajay N. GangurdeMilind M. Sardesai Original Article 06 November 2021 Pages: 851 - 855
Effective lectotypification of three names in the genus Iseilema (Poaceae: Panicoideae) Alok R. ChorgheArjun Prasad Tiwari OriginalPaper 29 September 2021 Pages: 857 - 858
A new replacement name for Eriobotrya integrifolia Aver. (Rosaceae) Ramalingam KottaimuthuMuthuramalingam Jothi Basu BriefCommunication 07 October 2021 Pages: 859 - 859
Correction to: Notes on the typification of four Himalayan aconites Priyanka AgnihotriDanish HusainTariq Husain Correction 09 October 2021 Pages: 861 - 861