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Xu, K.-W., Chen, C.-W., Kamau, P., Liao, W.-B. and Zhang, L.-B. 2019.

Four new species of the fern genus Hymenasplenium (Aspleniaceae) from Africa and Asia

. Phytotaxa. 416, 1 (Sep. 2019), 34–42. DOI:https://doi.org/10.11646/phytotaxa.416.1.4.