Cyrtandra argentii, a new species of Cyrtandra (Gesneriaceae) from the Philippines, and a review of the C. villosissima group

  • Jay Edneil C. Olivar Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21–23, 04103 Leipzig
  • Hannah Atkins Royal Botanic Garden Edinburgh, 20a Inverleith Row, EH3 5LR
  • Frank Hauenschild Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21–23, 04103 Leipzig and Leipzig University, Centre for Teacher Training and School Research, Prager Str. 38–40, 04317 Leipzig
  • Alexandra N. Muellner-Riehl Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21–23, 04103 Leipzig and German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig
Keywords: Cyrtandra, C. argentii sp. nov., George Argent, IUCN, Philippines


Cyrtandra argentii Olivar, H.J.Atkins & Muellner sp. nov., endemic to the Philippines and named after George Argent, is herein described and illustrated. Collections associated with this new species are often confused with three other species, namely C. ferruginea Merr., C.villosissima Merr., and C.hirtigera H.J.Atkins & Cronk. Distinguishing characters including keys, updated descriptions, distribution maps, and photos of live specimens are provided to aid identification of the four species. Following the International Union for the Conservation of Nature (IUCN) criteria, C. argentii sp. nov. is considered to be Near Threatened (NT) due to its distribution in a zone susceptible to anthropogenic pressure and the lack of any formal protection.


Atkins H.J. 2004. The Gesneriaceae of Sulawesi II: Seven new species of Cyrtandra. Edinburgh Journal of Botany 60 (3): 305–321.

Atkins H.J., Bramley G.L.C. & Clark J.R. 2013. Current knowledge and future directions in the taxonomy of Cyrtandra (Gesneriaceae), with a new estimate of species number. Selbyana 31 (2): 157–165. Available from [accessed 2 Jun. 2020].

Atkins H.J., Bramley G.L.C, Johnson M.A., Kartonegoro A., Nishii K., Kokubugata G., Möller M. & Hughes M. 2020. A molecular phylogeny of Southeast Asian Cyrtandra (Gesneriaceae) supports an emerging paradigm for Malesian plant biogeography. Frontiers of Biogeography 12 (1).

Atkins H.[J.] & Cronk Q.C.B. 2001. The genus Cyrtandra (Gesneriaceae) in Palawan, Philippines. Edinburgh Journal of Botany 58 (3): 443–458.

Atkins H.J., Heatubun C.D., Galloway L. & Bramley G.L.C. 2019. Two new species, Cyrtandra bungahijau and C. vittata, and notes on Cyrtandra (Gesneriaceae) from Yapen Island, Indonesia. Kew Bulletin 74 (2): 29.

Atkins H.[J.], Preston J. & Cronk Q.C.B. 2001. A molecular test of Huxley’s line: Cyrtandra (Gesneriaceae) in Borneo and the Philippines. Biological Journal of the Linnean Society 72 (1): 143–159.

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.

Biodiversity Management Bureau. 2015. Guidebook to Protected Areas of the Philippines. Biodiversity Management Bureau, Department of Environment and Natural Resources, Quezon City.

Bone R.E. & Atkins H.J. 2013. Four new species of Cyrtandra (Gesneriaceae) from the Latimojong Mountains, South Sulawesi. Edinburgh Journal of Botany 70 (3): 455–468.

Bramley G.L.C. 2005. Revision of Cyrtandra section Dissimiles (Gesneriaceae). Blumea - Biodiversity, Evolution and Biogeography of Plants 50 (1): 163–189.

Bramley G.L.C., Weber A., Cronk Q.C.B. & Bokhari M.H. 2003. The genus Cyrtandra (Gesneriaceae) in Peninsular Malaysia and Singapore. Edinburgh Journal of Botany 60 (3): 331–360.

Bramley G.L.C., Pennington R.T., Zakaria R., Tjitrosoedirdjo S.S. & Cronk Q.C.B. 2004. Assembly of tropical plant diversity on a local scale: Cyrtandra (Gesneriaceae) on Mount Kerinci, Sumatra. Biological Journal of the Linnean Society 81 (1): 49–62.

Bromhead E.F. 1838. Lamiales. Magazine of Natural History 2: 210.

Brongniart A.T. 1843. Magnoliopsida. Énumération des Genres de Plantes cultivés au Muséum d’histoire naturelle de Paris xxvi: 95.

Burtt B.L. 1970. Studies in the Gesneriaceae of the Old World. XXXIII. Some species of Cyrtandra, chiefly Bornean. Notes Royal Botanic Garden Edinburgh 30: 23–42.

Burtt B.L. 2001. A survey of the genus Cyrtandra (Gesneriaceae). Phytomorphology Golden Jubilee Issue 51: 393–404.

Candolle A. de & Candolle C. de 1883. Monographiæ phanerogamarum: Prodromi nunc continuatio, nunc revisio. Vol. 1–8, G. Masson; vol. 9, Masson & Cie, Paris.

Candolle A.P. de. 1816. Essai sur les propriétés médicales des plantes, comparées avec leurs formes extérieures et leur classification naturelle. Crochard, Paris.

Clark J.R., Atkins H.J., Bramley G.L.C., Jolles D.D., Roalson E.H. & Wagner W.L. 2013. Towards a phylogenetically informed taxonomy of Cyrtandra (Gesneriaceae) in the Solomon Islands. Selbyana 31 (2): 166–183.

Clark J.R., Wagner W.L. & Roalson E.H. 2009. Patterns of diversification and ancestral range reconstruction in the southeast Asian–Pacific angiosperm lineage Cyrtandra (Gesneriaceae). Molecular Phylogenetics and Evolution 53 (3): 982–994.

Cronk Q.C., Kiehn M., Wagner W.L. & Smith J.F. 2005. Evolution of Cyrtandra (Gesneriaceae) in the Pacific Ocean: the origin of a supertramp clade. American Journal of Botany 92 (6): 1017–1024.

Elmer A.D.E. 1913. Four scores of new plants. Leaflets of Philippine Botany V: 1751–1853.

Forster J.R. & Forster J.G.A. 1775. Cyrtandra. Characteres Generum Plantarum 3.

Gillett G.W. 1967. The genus Cyrtandra in Fiji. Contributions from the United States National Her­barium 37 (4): 107–159.

IUCN Standards and Petitions Subcommittee. 2017. Guidelines for Using the IUCN Red List Categories and Criteria Version 13. Prepared by the Standards and Petitions Subcommittee. Gland, Switzerland and Cambridge, U.K.

Johnson M.A. 2017. Four new species of Cyrtandra (Gesneriaceae) from the South Pacific Islands of Fiji. PhytoKeys 91: 85–104.

Johnson M.A., Clark J.R., Wagner W.L. & McDade L.A. 2017. A molecular phylogeny of the Pacific clade of Cyrtandra (Gesneriaceae) reveals a Fijian origin, recent diversification, and the importance of founder events. Molecular Phylogenetics and Evolution 116: 30–48.

Johnson M.A., Pillon Y., Sakishima T., Price D.K. & Stacy E.A. 2019. Multiple colonizations, hybridization and uneven diversification in Cyrtandra (Gesneriaceae) lineages on Hawai’i Island. Journal of Biogeography 46 (6): 1178–1196.

Kartonegoro A., Bone R. & Atkins H. 2018. Eleven new species of Cyrtandra (Gesneriaceae) from Sulawesi, Indonesia. Edinburgh Journal of Botany 75 (2): 173–204.

Lorence D.H. & Perlman S. 2007. A new species of Cyrtandra (Gesneriaceae) from Hawai’i, Hawaiian Islands. Novon: A Journal for Botanical Nomenclature 17 (3): 357–361.[357:ANSOCG]2.0.CO;2

Merrill E.D. 1906. New or noteworthy Philippine plants, V. Philippine Journal of Science 1 (Supplement): 169–246.

Merrill E.D. 1915. New or noteworthy Philippine plants, XI. The Philippine Journal of Science. Section C, Botany 10: 1–84.

Merrill E.D. 1922. An Enumeration of Philippine Flowering Plants. Bureau of Printing, Manila.

Nishii K., Kokubugata G., Möller M. & Atkins H.J. 2019. Notes on Cyrtandra (Gesneriaceae) from Japan, Taiwan and Batan Island (Philippines). Edinburgh Journal of Botany 76 (3): 333–344.

Pelser P.B., Barcelona J.F. & Nickrent D.L. 2011 onwards. Co’s Digital Flora of the Philippines [online]. Available from [accessed 2 May 2019].

Thiers B. continuously updated. Index Herbariorum [online].

Available from [accessed 5 May 2019].

Villanueva E.L.C. & Buot Jr I.E. 2018. Vegetation analysis along the altitudinal gradient of Mt Ilong, Halcon Range, Mindoro Island, Philippines. Biodiversitas Journal of Biological Diversity 19 (6): 2163–2174.

Wagner W.L., Wood K.R. & Lorence D.H. 2001. A new species of Cyrtandra (Gesneriaceae) from Kaua’i, Hawaiian Islands. Novon 11 (1): 146–152.

How to Cite
Olivar, J. E. C., Atkins, H., Hauenschild, F., & Muellner-Riehl, A. N. (2020). Cyrtandra argentii, a new species of Cyrtandra (Gesneriaceae) from the Philippines, and a review of the C. villosissima group. European Journal of Taxonomy, (676).