1. Taxonomic differentiation among Portulaca minensis (Portulacaceae) and its allies occurring within the Espinhaço Range, Brazil, based on macro and microcharacters

   • Thaíla Vieira Alves dos Santos
   • Kelly Regina Batista Leite
   • Reyjane Patricia de Oliveira

   Original Article 01 June 2021 Article: 42

   

2. The European species of Ribes subg. Ribes: population genetic testing of classical systematics

   • Leona Leišová-Svobodová
   • Pascal Kissling

   Original Article 01 June 2021 Article: 41

   

3. Intraspecific variation of Vanilla planifolia (Orchidaceae) in the Huasteca region, San Luis Potosí, Mexico: morphometry of floral labellum

   • Mónica Lima-Morales
   • Braulio Edgar Herrera-Cabrera
   • Adriana Delgado-Alvarado

   Original Article 26 May 2021 Article: 40

   

4. Setting the evolutionary timeline: Tillandsia landbeckii in the Chilean Atacama Desert

   • Johanna Möbus
   • Christiane Kiefer
   • Marcus A. Koch

   Original Article Open access 20 May 2021 Article: 39

   

5. Taxonomic revision of the acidophilic genus Acidiella (Dothideomycetes, Capnodiales) with a description of new species from Poland

   • Miroslav Kolařík
   • Hanna Stępniewska
   • Robert Jankowiak

   Original Article 04 May 2021 Article: 38

   

6. Effect of hybridization on the morphological differentiation of the red oaks Quercus acutifolia and Quercus grahamii (Fagaceae)

   • Alberto Pérez-Pedraza
   • Hernando Rodríguez-Correa
   • Ken Oyama

   Original Article 29 April 2021 Article: 37

   

7. Reproductive barriers and genetic differentiation between continental and island populations of Epidendrum fulgens (Orchidaceae)

   • Fábio Pinheiro
   • Giovanna Seleghin Veiga
   • Clarisse Palma da Silva

   Original Article 28 April 2021 Article: 36

   

8. Molecular analyses of the disjunctly distributed Osmunda regalis and O. japonica (Osmundaceae), with particular reference to introgression and hybridization

   • Chie Tsutsumi
   • Yoko Yatabe-Kakugawa
   • Masahiro Kato

   Original Article 17 April 2021 Article: 35

   

9. Cytogenetics of wild species of the Alstroemeriaceae family (Liliales)

   • Pedro Jara-Seguel
   • Paola Jara-Arancio
   • Cristian Araya-Jaime

   Original Article 12 April 2021 Article: 34

   

10. Description of hot spring dwelling Mastigocladus ambikapurensis sp. nov., using a polyphasic approach

    • Tameshwar Prasad Jaiswal
    • Sindhunath Chakraborty
    • Satya Shila Singh

    Original Article 11 April 2021 Article: 33

    

11. Mimosa brevicalyx (Leguminosae-Caesalpinioideae): a new species based on molecular, anatomical, and morphological data

    • Thainara Policarpo Mendes
    • Marcelo Fragomeni Simon
    • Marcos José da Silva

    Original Article 07 April 2021 Article: 32

    

12. Phylogeny and the evolutionary origins of myrmecophytism in the Neonauclea clade (Rubiaceae) revisited, with particular emphasis on the Philippine lineages

    • Jorge Anton D. Ordas
    • Sylvain G. Razafimandimbison
    • Grecebio Jonathan D. Alejandro

    Original Article 07 April 2021 Article: 31