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Issue: Vol. 769 No. 3: 13 Aug. 2026
Type: Article
Published: 2026-08-13
DOI: 10.11646/phytotaxa.769.3.6
Page range: 287-293
Abstract views: 121
PDF downloaded: 2

Hoya sinagtala (Apocynaceae, Asclepiadoideae): A New, Unusual Species from the Philippines

Institute of Biological Sciences; Graduate School; University of the Philippines Los Baños (UPLB); 4031 College; Laguna; Philippines; Biology Department; College of Science; Pamantasan ng Lungsod ng Maynila; General Luna; corner Muralla St; Intramuros; Manila; 1002 Metro Manila
48 Corrales and 1st Street; Nazareth; Cagayan de Oro City; Misamis Oriental; Philippines 9000
Botanical Research; Singapore Botanic Gardens; National Parks Board; 1 Cluny Road; Singapore 259569; Singapore
Eudicots endemic new species Samar taxonomy

Abstract

Hoya sinagtala Brillo, Cabactulan & Rodda sp. nov. (Apocynaceae, Asclepiadoideae) from the Philippines is described. When sterile, it resembles several species of Hoya section Acanthostemma, but its flowers make it readily distinguishable by its rotate corolla with a narrowly campanulate tube and free-spreading lobes and triangular-ovate corona lobes. No other species in the genus exhibits this unique combination of characters. The species was originally collected from the wild in Samar Island and subsequently widely distributed in cultivation under the informal name Hoya sp. Samar GN 0003 and Hoya sp. “Yellow Sapphire”; it is herein formally published after nearly seven years of horticultural circulation.

References

  1. Asis, A. (2024) A post from Co’s Digital Flora of the Philippines Facebook group page. Available from: https://www.facebook.com/groups/philippineplants/permalink/7960108154067782/ (accessed 10 August 2025)
  2. Aurigue, F.B. (2013) A collection of Philippine hoyas and their culture. Los Baños, Laguna.
  3. Aurigue, F.B., Sahagun, J.R. & Suarez, W.M. (2013) Hoya cutis-porcelana (Apocynaceae): A new species from Samar and Biliran Islands, Philippines. Journal of Nature Studies 12 (1): 12–17.
  4. Beentje, H. & Williamson, J. (2012) The Kew plant glossary: An illustrated dictionary of plant terms. Kew Publishing, Royal Botanic Gardens, Kew, London.
  5. Cabactulan, D.D., Aurigue, F., Pimentel, R., De Leon, M.D., Sahagun, J. & Rodda, M. (2019) Hoya of the Philippines, Part II: Hoya pulchra (Apocynaceae), a new species from southern Philippines. Annales Botanici Fennici 56 (1–3): 49–53. https://doi.org/10.5735/085.056.0109
  6. Cabactulan, D.D., Rodda, M. & Pimentel, R. (2017) Hoya of the Philippines Part I: Hoya migueldavidii (Apocynaceae, Asclepiadoideae), a new species from northern Mindanao, Philippines. PhytoKeys 80: 105–112. https://doi.org/10.3897/phytokeys.80.12872
  7. Davies, N.M.J., Drinkell, C. & Utteridge, T.M.A. (2023) The herbarium handbook: Sharing best practices from across the globe. Royal Botanic Gardens, Kew, London.
  8. De Leon, M.D., Cabactulan, D., Cuerdo, R.D. & Rodda, M. (2023) A new species of Hoya R.Br. (Apocynaceae, Asclepiadoideae) from the Philippines. PhytoKeys 222: 19–26. https://doi.org/10.3897/phytokeys.222.98275
  9. Endress, M.E., Meve, U., Middleton, D.J. & Liede-Schumann, S. (2019) Apocynaceae. In: Kadereit, J.W. & Bittrich, V. (Eds.) The families and genera of vascular plants 15: Flowering plants. Eudicots, Apiales, Gentianales (except Rubiaceae). Springer, pp. 207–411. https://doi.org/10.1007/978-3-319-93605-5_3
  10. Ferreras, U.F., Kloppenburg, R.D. & Tandang, D.N. (2014) Hoya irisiae. Hoya New 2 (2): 3–9.
  11. Gardino Nursery (2025) Hoya sp. ‘Yellow Sapphire’. Gardino Nursery. Available from: https://gardinonursery.com/product/hoya-sp-yellow-sapphire/ (accessed 1 August 2025)
  12. IUCN Standards and Petitions Committee (2024) Guidelines for using the IUCN Red List categories and criteria, version 16. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 10 August 2025)
  13. Kleijn, D. & Van Donkelaar, R. (2001) Notes on the taxonomy and ecology of the genus Hoya (Asclepiadaceae) in Central Sulawesi. Blumea 46: 457–483.
  14. Kloppenburg, R.D. (1989) Hoya heuschkeliana. The Hoyan 11 (1, part 2): 1–5.
  15. Kloppenburg, R.D. (1991) Philippine Hoya species: A monograph. Orca Publishing Co., Medford, Oregon. https://doi.org/10.5962/bhl.title.132603
  16. Kloppenburg, R.D. (2001) Hoya spartioides (Benth.) Kloppenburg. Fraterna 14 (2): 8–10.
  17. Kloppenburg, R.D., Siar, S.V. & Cajano, M.O. (2009) Additional four new species of Hoya R. Br. (Apocynaceae) from the Philippines. Asia Life Sciences 18: 144–147.
  18. Kloppenburg, R.D., Siar, S.V. & Ferreras, U.F. (2010) Hoya carmelae. Fraterna 23 (4): 9–13.
  19. Kuang, Y., Jia, R., Rodda, M., Zhang, J., Xia, M., Wu, C. & Liao, J. (2024) Morphological diversity and evolutionary changes of pollinaria in Hoya (Marsdenieae: Apocynaceae). Botanical Journal of the Linnean Society 206 (1): 29–54. https://doi.org/10.1093/botlinnean/boae011
  20. Lamb, A. & Rodda, M. (2016) A guide to Hoyas of Borneo. Natural History Publications (Borneo), Kota Kinabalu.
  21. Linnaeus, C. (1753) Species Plantarum. Laurentii Salvii. (1): 471.
  22. Omlor, R. (1996) Notes on Marsdenieae (Asclepiadaceae)—A new, unusual species of Hoya from northern Borneo. Novon 6: 290–294.
  23. Pelser, P.B., Barcelona, J.F. & Nickrent, D.L. (Eds.) (2011 onwards) Co’s Digital Flora of the Philippines. Available from: http://philippineplants.org (accessed 10 August 2022)
  24. Rahayu, S. & Astuti, I.P. (2019) Hoya decipulae (Apocynaceae, Asclepiadoideae), a new species from Sumatra, Indonesia. Reinwardtia 18: 43–50. https://doi.org/10.14203/reinwardtia.v18i1.3566
  25. Rahayu, S. & Rodda, M. (2020) Hoya occultata (Apocynaceae, Asclepiadoideae), a new species from Sulawesi, Indonesia. Annales Botanici Fennici 57 (4–6): 331–334. https://doi.org/10.5735/085.057.0429
  26. Rodda, M. (2015) A new typification of Hoya zollingeriana (Apocynaceae, Asclepiadoideae). Gardens’ Bulletin Singapore 67 (2): 305–307. https://doi.org/10.3850/S2382581215000265
  27. Rodda, M. (2017) Index of names and types of Hoya (Apocynaceae: Asclepiadoideae) of Borneo. Gardens’ Bulletin Singapore 69 (1): 33–65. https://doi.org/10.26492/gbs69(1).2017-02
  28. Rodda, M. & Rahayu, S. (2022) Nine new species and one new subspecies of Hoya (Apocynaceae: Asclepiadoideae) from Borneo. Gardens’ Bulletin Singapore 74 (1): 101–129. https://doi.org/10.26492/gbs74(1).2022-08
  29. Rodda, M. & Rahayu, S. (2025) A new night-blooming species of Hoya (Apocynaceae: Asclepiadoideae) from Borneo. Nordic Journal of Botany 2025 (8). https://doi.org/10.1002/njb.04787
  30. Rodda, M. & Simonsson, N. (2022) Contribution to a revision of Hoya (Apocynaceae: Asclepiadoideae) of Papuasia. Part II: eight new species, one new subspecies. Blumea 67 (2): 139–155. https://doi.org/10.3767/blumea.2022.67.02.08
  31. Roxburgh, W. (1811) Plants of the coast of Coromandel: Selected from drawings and descriptions presented to the hon. court of directors of the East India Company. W. Bulmer and Co. (3): 18.
  32. Schlechter, R. (1906) New Philippine Asclepiadaceae. Philippine Journal of Science 1 (Suppl. 4): 301–302.
  33. Sprengel, K.P.J. (1826) Systema Vegetabilium. Librariae Dieterichianae. (3): 127.
  34. Thiers, B. (2023) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden. Available from: http://sweetgum.nybg.org/science/ih/ (accessed August 2025)

How to Cite

Brillo, S.C., Cabactulan, D.D. & Rodda, M. (2026) Hoya sinagtala (Apocynaceae, Asclepiadoideae): A New, Unusual Species from the Philippines. Phytotaxa 769 (3): 287–293. https://doi.org/10.11646/phytotaxa.769.3.6