Zeuxine exilis Ridl. (1906:236)
Ridley's jewel orchid, Ridley's ground orchid, Slender jewel orchid
Taxonomy & Nomenclature
After its rediscovery by (Green et al., 2010), Zeuxine exilis was synonymised with the Javan congener Z. gracilis by (Barretto et al., 2011), but was maintained as a distinct species based upon two characters by (Ormerod, 2018:271).
Last record: 18 October 1904
Rediscovered on 17 November 2009 (Green et al., 2010:320)
Christmas Island, Indian Ocean
Type locality: "AUSTRALIA. Christmas Island, Murray Hill track" (Ormerod, 2018:271)
Biology & Ecology
Lectotype designated by (Wood, 1982:143). Isolectotypes exist in the BM and SING collections (Ormerod, 2018:271).
Original scientific description:
Ridley, H. N. (1906). The botany of Christmas Island. Journal of the Straits Branch, Royal Asiatic Society 45: 156-271.
Barretto, G., Cribb, P. and Gale, S. (2011). The Wild Orchids of Hong Kong. Borneo: Natural History Publications.
Du Puy, D. J. (1988). Mapping of Christmas Island native and endemic plants with limited distributions. Unpublished report to the Australian National Parks and Wildlife Service, Canberra, A.C.T., Australia.
Du Puy, D. J. (1993). Christmas Island, pp. 1-30. In: Flora of Australia, vol. 50, Oceanic Islands. Australian Government Publishing Service, Canberra, A.C.T., Australia.
Du Puy, D. J., Jones, D. L. and Edgar, E. (1993). Orchidaceae, pp. 516-528. In: Flora of Australia, vol. 50, Oceanic Islands. Australian Government Publishing Service, Canberra, A.C.T., Australia.
Green, P. T., O’Dowd, D. J. and Lake, P. S. (1997). Control of seedling recruitment by land crabs in rain forest on a remote oceanic island. Ecology 78: 2474- 2486.
Green, P. T., O’Dowd, D. J. and Lake, P. S. (2008). Recruitment dynamics in a rainforest seedling community: context-independent impact of a keystone consumer. Oecologia 156: 373-385.
Green, Peter T., Claussen, Jeff and O'Dowd, Dennis J. (2010). Lost for a century: rediscovery of the endemic Ridley's jewel orchid, Zeuxine exilis Ridl., on Christmas Island, Indian Ocean. The Gardens' Bulletin, Singapore. 61(2): 319-326.
Holmes, J. and Holmes, G. (2002). Conservation status of the flora of Christmas Island, Indian Ocean. Unpublished report to Parks Australia North, Christmas Island, Indian Ocean.
James, D., Green, P., Humphreys, W. and Woinarski, J. C. Z. (2019). Endemic species of Christmas Island, Indian Ocean. Records of the Western Australian Museum 34(2): 55-114.
Ormerod, Paul. (2018). Notes on Zeuxine Lindl. (Orchidaceae: Goodyerinae). Harvard Papers in Botany 23(2): 269-277. doi:10.3100/hpib.v23iss2.2018.n10
Ridley, H. N. (1905). An expedition to Christmas Island. Journal of the Straits Branch, Royal Asiatic Society 45: 137-155.
Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.
Wood, J. J. (1982). The orchids of Christmas Island. The Orchadian 7: 142-146.