Streptocaulon sylvestre Wight (1834:65)
Taxonomy & Nomenclature
Conservation Status
Rediscovered (Das, 1996; Kar et al., 2025)
Distribution & Habitat
Eastern Himalayas
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Wight, R. (1834). Contributions to the Botany of India. London: Parbury, Allen & Co.
Other references:
Ahmed, Z. U. et al. (eds.). (2008). Encyclopedia of Flora and Fauna of Bangladesh 6: 1-408. Asiatic Society of Bangladesh.
Das, A. P. (1996). Rediscovery of Streptocaulon sylvestre Wight—An endangered and little known endemic plant of eastern India. Journal of the Bombay Natural History Society 93(2): 320-322.
Das, P., Ghosh, C. and Das, A. P. (2020). Present status and phytosociology of critically endangered Streptocaulon sylvestre Wight (Apocynaceae) in its only natural habitat in North Bengal University campus, India. Pleione 14(1): 57-70. doi:10.26679/Pleione.14.1.2020.057-070
Grierson, A. J. C. and Long, D. G. (2001). Flora of Bhutan 2: 1-1675. Royal Botanic Gardens, Edinburgh.
Hooker, J. P. (1883). Streptocaulon Wight & Arn. In: Hooker, J. D. (ed.). The Flora of British India, Vols. 4. L. Reeve & Co Ltd, Ashford, Kent. London. Pp. 9-10.
Jagtap, A. P. and Singh, N. P. (1999). Fascicles of Flora of India 24: 1-332. Botanical Survey of India, New Delhi.
Kar, Pallab et al. (2025). Phytochemical, pharmacological, and phylogenetic characterization of the critically endangered endemic plant Streptocaulon sylvestre Wight (Apocynaceae) from Eastern Himalaya. Pleione 19(3): 387-400. https://doi.org/10.26679/Pleione.19.3.2025.387-400
POWO. (2026). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 17 February 2026]
Prain, D. (1903). Bengal Plants. Vols. I & II. West, Newman & Co., London.
Mycetia hainanensis H.S.Lo (1991:112)
Taxonomy & Nomenclature
Conservation Status
Last record: 9 April 1988 (Xu et al., 2026:283)
Rediscovered on: 8 May 2025 (Xu et al., 2026:283)
Distribution & Habitat
Ledong County & Sanya City, Hainan Province, China
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Lo, H. S. (1991). Materials for Chinese Rubiaceae (II). Guihania 11: 97-116.
Other references:
Xu, Dongxian, Li, Li, Zhang, Buyun and Song, Zhuqiu. (2026). Morphological and molecular evidence support the inclusion of Mycetia hainanensis in Mouretia (Rubiaceae). PhytoKeys 270: 273-288. https://doi.org/10.3897/phytokeys.270.180324https://doi.org/10.3897/phytokeys.270.180324
Rondeletia odorata breviflora Hook.f. (1878:6350)
Taxonomy & Nomenclature
Conservation Status
Extinct (WCMC, 1992:222) or Invalid (synonym of Rondeletia odorata odorata) (POWO, 2025)
Distribution & Habitat
Panama
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
POWO. (2025). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 28 August 2025]
WCMC (World Conservation Monitoring Centre). (1992). Global Biodiversity: Status of the Earth's living resources. London: Chapman & Hall. xx + 594 pp.
Psychotria bifaria minimicalyx (K.Schum.) O.Lachenaud (2019:161)
Taxonomy & Nomenclature
Synonym/s: Psychotria minimicalyx K.Schum. in Bot. Jahrb. Syst. 28: 94 (1899)
Conservation Status
Last (and only) record: 1899 (Onana et al., 2011:294)
Rediscovered in: 1948 (Onana et al., 2011:294)
IUCN RedList status: Critically Endangered
Distribution & Habitat
Cameroon
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Cheek, Martin. (2004). Psychotria minimicalyx. The IUCN Red List of Threatened Species 2004: e.T46164A11033232. https://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T46164A11033232.en. Accessed on 27 July 2025.
Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
Onana, Jean Michel, Cheek, Martin and Pollard, Benedict John. (2011). Red Data Book of the Flowering Plants of Cameroon: IUCN Global Assessments. Kew, Richmond, Surrey, UK: Kew Publishing. 578 pp.
POWO. (2025). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 27 July 2025]
Ixora batesii Wernham (1916:227)
Taxonomy & Nomenclature
Conservation Status
Rediscovered [by implication] (Cheek & Rokni, 2017)
IUCN RedList status: Endangered
Considered possibly Extinct by (Onana et al., 2011:273), but it has been recorded in 2014 (Cheek & Rokni, 2017), and was thus Rediscovered by implication.
Distribution & Habitat
Cameroon
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Cheek, Martin and Rokni, S. (2017). Ixora batesii. The IUCN Red List of Threatened Species 2017: e.T110093770A110093772. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T110093770A110093772.en. Accessed on 27 July 2025.
Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
Onana, Jean Michel, Cheek, Martin and Pollard, Benedict John. (2011). Red Data Book of the Flowering Plants of Cameroon: IUCN Global Assessments. Kew, Richmond, Surrey, UK: Kew Publishing. 578 pp.
POWO. (2025). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 27 July 2025]