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First record of Thottea duchartrei Sivar., A. Babu & Balach. (Aristolochiaceae) in Sri Lanka

Authors:

T.M.S.G. Tennakoon ,

Research and Development Centre, Link Natural Products (Pvt) Ltd, Malinda, Kapugoda, LK
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R. Borosova,

Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK, GB
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C. Suraweera,

Research and Development Centre, Link Natural Products (Pvt) Ltd, Malinda, Kapugoda, LK
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S. Herath,

Research and Development Centre, Link Natural Products (Pvt) Ltd, Malinda, Kapugoda, LK
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T. De Silva,

Research and Development Centre, Link Natural Products (Pvt) Ltd, Malinda, Kapugoda, LK
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C. Padumadasa,

University of Sri Jayewardenepura, LK
About C.
Department of Chemistry
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J. Weerasena,

Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo,, LK
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N. Gunaratna,

Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, LK
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N. Gunasekera,

Research and Development Centre, Link Natural Products (Pvt) Ltd, Malinda, Kapugoda, LK
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S. Edwards,

Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, GB
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S. Wijesundara

National Institute of Fundamental Studies, LK
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Abstract

The occurrence of Thottea duchartrei Sivar., A. Babu & Balach. (Aristolochiaceae), a shrub species previously recorded as endemic to India, has been reported in Sri Lanka for the first time. Previously, only one species of Thottea (T. siliquosa (Lam.) Ding Hou) has been recorded in the Revised Handbook to the Flora of Ceylon. Two new populations of T. duchartrei were discovered in two isolated sites of disturbed, mid country secondary forest at Polthenna and Ihalagama in Hatharaliyadda, Sri Lanka. The taxonomic treatment includes a species description of T. duchartrei, its distribution, and phenology. A comparative account of the morphological differences between T. duchartrei and T. siliquosa is provided for easy identification of the two species of Thottea. Further, floral characteristics which are unique to the original collection of T. duchartrei from Sri Lanka are also reported. The gene sequences, rbcL, t RNALys (trnK) and psba-transH were submitted to the GenBank database as the first record of this species. Iconography of floral variations, habitats, and local and global distribution maps are also included. Identification using morphological characters, DNA barcoding to confirm the species, and its conservation status are discussed. Biogeographical influences such as habitat fragmentation, soil erosion, invasive species, the low density of natural pollinators and human settlement are also discussed. Based on morphological characters and DNA analysis, we confirmed the first known collections of T. duchartrei from Sri Lanka.

How to Cite: Tennakoon, T.M.S.G., Borosova, R., Suraweera, C., Herath, S., De Silva, T., Padumadasa, C., Weerasena, J., Gunaratna, N., Gunasekera, N., Edwards, S. and Wijesundara, S., 2022. First record of Thottea duchartrei Sivar., A. Babu & Balach. (Aristolochiaceae) in Sri Lanka. Journal of the National Science Foundation of Sri Lanka, 50(2), pp.441–452. DOI: http://doi.org/10.4038/jnsfsr.v50i2.10546
Published on 09 Sep 2022.
Peer Reviewed

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