by Butler, Hannah C., Johnson, Steven D.
Published in Biotropica (01.07.2023)

by Butler, Hannah C., Johnson, Steven D.
Published in Austral ecology (01.08.2022)

by Butler, Hannah C, Johnson, Steven D
Published in Botanical journal of the Linnean Society (19.06.2020)

by Butler, Hannah C., Cozien, Ruth J., Johnson, Steven D.
Published in Plant systematics and evolution (01.02.2022)

by Butler, Hannah C, Rogerson, AJ, Peter, Craig I, Johnson, Steven D, Newman, Ethan
Published in Botanical journal of the Linnean Society (09.10.2024)

by Butler, Hannah C., Johnson, Steven D.
Published in South African journal of botany (01.11.2023)