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Issue: Vol. 702 No. 2: 27 May 2025
Type: Article
Published: 2025-05-27
DOI: 10.11646/phytotaxa.702.2.5
Page range: 175-186
Abstract views: 114
PDF downloaded: 11

Circumscription of African Dipcadi (Asparagaceae, Scilloideae) species based on ITS sequence data and morphology

National Herbarium and Botanic Garden, Research Services Department, Ministry of Lands, Agriculture, Fisheries, Water and Rural Development, Zimbabwe; University of Zimbabwe, Faculty of Science, Biological Sciences and Ecology, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe
Natural History Museum, University of Oslo, Integrative Systematics of Plants and Fungi, P.O. Box 1172, N-0316 Blindern, Oslo, Norway
University of Zimbabwe, Faculty of Science, Biological Sciences and Ecology, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe
University of Zimbabwe, Faculty of Science, Biological Sciences and Ecology, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe
Natural History Museum, University of Oslo, Integrative Systematics of Plants and Fungi, P.O. Box 1172, N-0316 Blindern, Oslo, Norway
Natural History Museum, University of Oslo, Integrative Systematics of Plants and Fungi, P.O. Box 1172, N-0316 Blindern, Oslo, Norway
Hyacinthaceae phylogeny species delimitation sanger sequencing Monocots

Abstract

Species circumscriptions in the genus Dipcadi were evaluated based on both morphological and molecular data, with an emphasis on African taxa. DNA was extracted and the ITS region amplified for 33 Dipcadi accessions, and an additional 18 ITS sequences were obtained from GenBank. Phylogenetic analyses based on Maximum Likelihood and Bayesian Inference were congruent. The species D. marlothii and D. glaucum are recovered as monophyletic, and their status is also supported by morphological data. Other species are either paraphyletic (D. viride), polyphyletic (D. longifolium, D. serotinum, and D. erythraeum), or in unresolved clades with other taxa (D. gracillimum and D. platyphyllum). Future studies should include additional loci and more material to improve the resolution of species relationships and to properly delimit non-monophyletic taxa.

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How to Cite

Chapano, C., Løken, S.B., Kativu, S., Zimudzi, C., Bjorå, C.S. & Stedje, B. (2025) Circumscription of African Dipcadi (Asparagaceae, Scilloideae) species based on ITS sequence data and morphology. Phytotaxa 702 (2): 175–186. https://doi.org/10.11646/phytotaxa.702.2.5