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      Chroesthes (Acanthaceae) in Peninsular Malaysia, including a new species from Kelantan and a new record from Terengganu

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      PhytoKeys

      Pensoft Publishers

      Conservation status, revision, taxonomy

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          Abstract

          Chroesthes is a small genus that includes three species from Peninsular Malaysia: Chroesthes faizaltahiriana Siti-Munirah sp. nov., C. lanceolata (T. Anderson) B.Hansen and C. longifolia (Wight) B.Hansen. Chroesthes faizaltahiriana , recently discovered in the State of Kelantan, is described and illustrated. This species is similar to the common species C. longifolia , but is distinguished mainly by its inflorescence type, calyx shape and its flowers being bright orange instead of dark purple internally. Chroesthes lanceolata is a new record for Peninsular Malaysia and has only been collected once. Following the IUCN Red List Categories and Criteria, these three species are assessed (national scale assessment) as Critically Endangered ( C. faizaltahiriana and C. lanceolata ) and Least Concern ( C. longifolia ).

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          Most cited references 14

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          Toward a comprehensive understanding of phylogenetic relationships among lineages of Acanthaceae s.l. (Lamiales).

          Acanthaceae (Asteridae; Lamiales) include ∼4000 species and encompass a range of morphological diversity, habitats, and biogeographic patterns. Although they are important components of tropical and subtropical habitats worldwide, inadequate knowledge of the family's phylogenetic framework has impeded comparative research. In this study, we sampled all known lineages of Acanthaceae including Andrographideae. Also included were eight of 13 genera whose relationships remain enigmatic. We used sequence data from nrITS and four chloroplast noncoding regions, and parsimony and Bayesian methods of analysis. Results strongly support most aspects of relationships including inclusion of Avicennia in Acanthaceae. Excepting Neuracanthus, newly sampled taxa are placed with strong support; Kudoacanthus is in Justicieae, Tetramerium lineage, and the remaining enigmatic genera are in Whitfieldieae or Barlerieae, and Andrographideae are sister to Barlerieae. This last result is unanticipated, but placement of Andrographideae based on structural characters has been elusive. Neuracanthus is monophyletic but placement relative to (Whitfieldieae (Andrographideae + Barlerieae)) is weakly supported. Many clades have clear morphological synapomorphies, but nonmolecular evidence for some remains elusive. Results suggest an Old World origin with multiple dispersal events to the New World. This study informs future work by clarifying sampling strategy and identifying aspects of relationships that require further study.
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            Classification of Acanthaceae

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              Thismia domei and T. terengganuensis ( Thismiaceae ), two new species, and T. javanica , a new record from Terengganu, Peninsular Malaysia

              Abstract Two new species of the mycoheterotrophic genus Thismia Griff. ( Thismiaceae ), Thismia domei Siti-Munirah and T. terengganuensis Siti-Munirah from Peninsular Malaysia, are described and illustrated. Thismia domei , characterized by its perianth lobes that are upright and curve inward, but are imperfectly connate, falls within section Odoardoa . Thismia terengganuensis is characterized by its mitre with three appendages on its apex, so falls within section Geomitra . Both new species are unique and totally different from other described species, T. domei by the trichomes on its outer perianth tube surface and T. terengganuensis by its mitre with slender appendages. Thismia javanica J.J.Sm, also from Terengganu, is a new record for Peninsular Malaysia.
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                Author and article information

                Contributors
                Journal
                PhytoKeys
                PhytoKeys
                3
                urn:lsid:arphahub.com:pub:F7FCE910-8E78-573F-9C77-7788555F8AAD
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2021
                12 March 2021
                : 174
                : 127-146
                Affiliations
                [1 ] Forest Research Institute Malaysia, 52109, Kepong, Selangor, Malaysia Forest Research Institute Malaysia Kepong Malaysia
                Author notes
                Corresponding author: Siti-Munirah Mat Yunoh ( sitimunirah@ 123456frim.gov.my )

                Academic editor: E. Fischer

                Article
                62023
                10.3897/phytokeys.174.62023
                7979676
                Siti-Munirah Mat Yunoh

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Categories
                Research Article
                Acanthaceae
                Taxonomy
                Asia

                Plant science & Botany

                taxonomy, revision, conservation status

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