Echeveria islasiae, una nueva especie de la serie Longistylae (Crassulaceae) Jerónimo Reyes SantiagoLuis Emilio de la Cruz-López Original Research 17 August 2021 Pages: 363 - 373
A new species of Echeveria (Crassulaceae) from Durango, Mexico, supported by morphology and DNA diagnostic characters Luis E. de la Cruz-LópezJerónimo Reyes SantiagoFrancisco Vergara-Silva Original Research 28 September 2021 Pages: 374 - 382
Phylogenetic, biogeographical, and morphological diversity of the Paronychia chartacea (Caryophyllaceae) clade from the Coastal Plain Floristic Province of North America John J. SchenkAndrea D. Appleton Original Research 07 September 2021 Pages: 383 - 392
A taxonomic revision of Ophiobotrys, Osmelia, and Pseudosmelia (Samydaceae/Salicaceae s.l.) Mac H. Alford Original Research 16 August 2021 Pages: 393 - 409
A checklist of Henriettea (Melastomataceae, Henrietteeae) in the Antilles, with taxonomic notes and lectotypifications Wilder Carmenate-ReyesFabián A. Michelangeli Original Research 10 September 2021 Pages: 410 - 421
Conchocarpus kallunkiae (Rutaceae: Galipeinae), a new endemic species from the tropical rainforest in the Magdalena River Valley in Colombia Yeison Londoño-EcheverriAna María Trujillo-LópezMilton Groppo Original Research 29 July 2021 Pages: 422 - 430
Una nueva variedad de Orphanodendron grandiflorum (Leguminosae: Papilionoideae) de Colombia César CastellanosGwilym P. LewisWilliam Ariza Original Research 03 August 2021 Pages: 431 - 437
Nomenclatural synopsis and typifications in Mollia (Malvaceae: Grewioideae) Maria Tereza Rodrigues CostaMassimo Giuseppe BoviniElsie Franklin Guimarães Original Research 10 September 2021 Pages: 438 - 445
Amendments to the nomenclature of Lippia (Verbenaceae: Lantaneae): typification of names linked to the Brazilian flora Pedro Henrique CardosoPablo MoroniFátima Regina Gonçalves Salimena Original Research 25 June 2021 Pages: 446 - 458
An inventory of the ferns and lycophytes of the Lower Tapajós River Basin in the Brazilian Amazon reveals collecting biases, sampling gaps, and previously undocumented diversity Marise Helen Vale de OliveiraBenjamin M. TorkeThaís Elias Almeida Original Research 18 June 2021 Pages: 459 - 480