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Issue: Vol. 766 No. 1: 7 Jul. 2026
Type: Article
Published: 2026-07-07
DOI: 10.11646/phytotaxa.766.1.6
Page range: 84-90
Abstract views: 55
PDF downloaded: 4

Corybas apoensis (Orchidaceae), a new endemic species from Mt. Apo, Philippines

Department of Biological Sciences and Environmental Studies; University of the Philippines Mindanao; Davao City 8000; Philippines; Wildlife-Human Interaction Studies; Ecological Research and Biodiversity Conservation Laboratory; University of the Philippines Mindanao; Davao City; Philippines
Provincial Environment and Natural Resources Office; Davao del Sur; Mabini Superhighway; Aplaya; Digos City 8002; Philippines
Philippine National Herbarium; Botany and National Herbarium Division; National Museum of Natural History; National Museum of the Philippines; Teodoro F. Valencia Cir; Ermita; Manila; 1000; Philippines
Philippine Taxonomic Initiative; Inc; Botanica Building; El Nido; Palawan 5313; Philippines
Natural Science Department; College of Arts and Sciences; University of Southeastern Philippines; Iñigo St.; Bo. Obrero; Davao City 8000; Philippines
Monocots Helmet orchid Rare Diurideae Malesia Taxonomy

Abstract

Corybas apoensis, a new species of tribe Acianthinae endemic to Mindanao, is described herein. Among the currently recognized species of the tribe, it most closely resembles C. viridisepalus in overall floral morphology, particularly in having upright flowers borne on a slender, cylindric, erect ovary and the flower possessing a dorsal sepal and labellum tinged with conspicuous carmine veins. Both species further share a pilose labellum. However, this notable new species is distinct by having white floral background and a dorsal sepal being densely papillate on the abaxial surface. We also provided a summarized key morphological characteristics that distinguishes our new species from the later.

References

  1. Ames, O. (1908) Studies in the Orchid Flora of the Philippines. Orchidaceae: Illustrations and studies of the Family Orchidaceae issuing from the Ames Botanical Laboratory 2: 17–257.
  2. Bachman, S., Moat, J., Hill, A.W., de Torre, J. & Scott, B. (2011) Supporting Red List Threat Assessments with GeoCAT: Geospatial Conservation Assessment Tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
  3. Comber, J.B. (1990) Orchids of Java. Royal Botanic Gardens, Kew.
  4. Delos Angeles, M.D., Buot, I.E., Moran, C.B., Robinson, A.S. & Tandang, D.N. (2022) Corybas kainganganianus (Orchidaceae), a new, rare helmet orchid from Samar Island, Philippines. Phytotaxa 543 (2): 127–134. https://doi.org/10.11646/phytotaxa.543.2.3
  5. Dransfield, J., Comber, J.B. & Smith, G. (1986) A synopsis of Corybas (Orchidaceae) in west Malesia and Asia. Kew Bulletin 4: 575–613. https://doi.org/10.2307/4103118
  6. IUCN Standards and Petitions Committee (2024) Guidelines for Using the IUCN Red List Categories and Criteria. Version 16. Prepared by the Standards and Petitions Committee of the IUCN Species Survival Commission, 122 pp.
  7. Lewis, B.A. & Cribb, P. (1991) Orchids of the Solomon Islands and Bougainville. Royal Botanic Gardens, Kew.
  8. Lohman, D.J., De Bruyn, M., Page, T.J., Von Rintelen, K., Hall, R., Ng, P.K.L., Shih, H-T., Carvalho, G.R. & Von Rintelen, T. (2011) Biogeography of the Indo-Australian Archipelago. Annual Review of Ecology, Evolution, and Systematics 42: 205–226. https://doi.org/10.1146/annurev-ecolsys-102710-145001
  9. Lyon, S.P. (2016) Six new species of New Guinea Corybas. Malesian Orchid Journal 18: 1–19.
  10. Pelser, P.B., Barcelona, J.F. & Nickrent, D.L. (2011) Co’s Digital Flora of the Philippines. Available from: http://www.philippineplants.org (accessed 8 February 2026)
  11. POWO (2026) Plants of the World Online. Corybas Salisb. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/ (accessed 6 June 2026)
  12. Salisbury, R.A. (1807) LXXXIII Corybas aconitiflorus. In: Salisbury, R.A., Hooker, W. & Shury, D.D. (Eds.) The Paradisus Londonensis: or Coloured Figures of Plants Cultivated in the Vicinity of the Metropolis. W.Hooker, London, t. 83.
  13. Schlechter, F.R.R. (1923) Corybas Salisb. oder Corysanthes R. Br.? Repertorium specierum novarum regni vegetabilis. Centralblatt für Sammlung und Veröffentlichung von Einzeldiagnosen neuer Pflanzen Beihefte 19: 18–24. https://doi.org/10.1002/fedr.19230190104
  14. Smith, J.J. (1927) Orchidaceae. Mitteilungen aus dem Institut für Allgemeine Botanik Hamburg 7: 1–70.
  15. Tandang, D.N., Reyes, T.Jr., Bustamante, R.A.A., Callado, J.R.C., Tadiosa, E.R., Agoo, E.M. & Lyon, S.P. (2020a) Corybas boholensis (Orchidaceae): a new jewel orchid species from Bohol Island, Central Visayas, Philippines. Phytotaxa 477: 261–268. https://doi.org/10.11646/phytotaxa.477.2.10
  16. Tandang, D.N., Bustamante, R.A.A., Ferreras, U., Hadsall, A.S., Pym-Lyon, S. & Robinson, A.S. (2020b) Corybas circinatus (Orchidaceae), a new species from Palawan, the Philippines. Phytotaxa 446: 135–140. https://doi.org/10.11646/phytotaxa.446.2.7
  17. Tandang, D.N., Docot, R.V.A., Galindon, J.M., Reyes, T.Jr., Tadiosa, E., Tandang, S.D.A., Moran, C. & Bustamante, R.A.A. (2023) Corybas hamiguitanensis (Orchidaceae), a new species from a UNESCO world heritage site in the Philippine. Phytotaxa 598 (1): 80–88. https://doi.org/10.11646/phytotaxa.598.1.6
  18. Van Royen, P. (1983) The genus Corybas (Orchidaceae) in its eastern areas. Phanerogamarum Monographiae. J. Cramer, Vaduz, 175 pp.
  19. Williams, L.O. (1937) Orchid studies, III. Botanical Museum Leaflets, Harvard University 5: 49–60. https://doi.org/10.5962/p.168609

How to Cite

Agad, K.C., Mallari, A.L., Tandang, D.N., Bustamante, R.A.A. & Salas, D.S. (2026) Corybas apoensis (Orchidaceae), a new endemic species from Mt. Apo, Philippines. Phytotaxa 766 (1): 84–90. https://doi.org/10.11646/phytotaxa.766.1.6