Neonauclea kranjiensis K.M.Wong & W.W.Seah (2018:292)
Taxonomy & Nomenclature
Synonym/s: Neonauclea sp. 2 [used by Wong, 1988, 1989]
Conservation Status
Extinct (Seah & Wong, 2018; POWO, 2024; Christenhusz & Govaerts, 2025)
Last (and only) record: 1894 (Seah & Wong, 2018 [sole record; plus date]; Christenhusz & Govaerts, 2025 [date only])
Distribution & Habitat
Kranji, Singapore
Anatomy & Morphology
Biology & Ecology
Hypodigm
This taxon is only known from the Holotype (Seah & Wong, 2018:292):
H.N. Ridley 6511 (holotype SING [SING0251857])
Media
References
Original scientific description:
Seah, W. W. and Wong, K. M. (2018). Flora of Singapore precursors, 7. A newly diagnosed species of Neonauclea (Rubiaceae: Naucleeae) now extinct in Singapore and notes on Neonauclea excelsa and N. calycina. Gardens' Bulletin Singapore 70(2): 289-294. doi: 10.26492/gbs70(2).2018-05
Other references:
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2023). Uitgestorven. Op plantenjacht rond de wereld: 1-511. Sterck & De Vreese.
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2025). Plant extinction in the Anthropocene. Botanical Journal of the Linnean Society 207(3): 183-196. https://doi.org/10.1093/botlinnean/boae045 [Appendix S1]
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Graner, Torun. (2026). A World Without Trees: An Analysis of Global Tree Extinction Rates, Geographical Distribution and Correlation to Socioeconomic Factors. Master’s Dissertation, School of Natural Sciences, Technology and Environmental Studies, Södertörn University. 41 pp.
Middleton, J. D. (ed.). (2019). Flora of Singapore 13: 1-654. Singapore Botanic Gardens.
POWO. (2024). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 3 November 2024]
Wong, K. M. (1988). The Arborescent Rubiaceae of Malaya. Bound and distributed by the author. pp. 1-245.
Wong, K. M. (1989). Rubiaceae. In Ng, F.S.P. (ed) Tree Flora of Malaya, A Manual for Foresters, vol. 4, pp. 324-425. Malaysia: Longman.