Cyrtandra argentii, a new species of Cyrtandra (Gesneriaceae) from the Philippines, and a review of the C. villosissima group Author Olivar, Jay Edneil C. Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21 – 23, 04103 Leipzig, Germany. & German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany jay_edneil.olivar@uni-leipzig.de Author Atkins, Hannah J. Royal Botanic Garden Edinburgh, 20 a Inverleith Row, EH 3 5 LR, United Kingdom. HAtkins@rbge.org.uk Author Hauenschild, Frank Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21 - 23, 04103 Leipzig, Germany. & Leipzig University, Centre for Teacher Training and School Research, Prager Str. 38 - 40, 04317 Leipzig, Germany. frank.hauenschild@uni-leipzig.de Author Muellner-Riehl, Alexandra N. Department of Molecular Evolution and Plant Systematics & Herbarium (LZ), Institute of Biology, Leipzig University, Johannisallee 21 - 23, 04103 Leipzig, Germany. & German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany. muellner-riehl@uni-leipzig.de text European Journal of Taxonomy 2020 2020-06-30 676 1 15 journal article 10.5852/ejt.2020.676 36afc129-759b-4054-a708-6d42a813d155 2118-9773 3928370 Cyrtandra ferruginea Merr. ( Merrill 1915 ) Figs 1 , 3B, 4B Material examined Type PHILIPPINES • Luzon , Camarines , Mt Cauayan ; 9 Dec. 1913 ; Phil. Pl. Ramos 1548 ( syntypes : BM !, GH !, NY !, P !, US !). Additional material PHILIPPINES • Mt Isarog , Camarines Sur ; Aug. 1915 ; Ramos 23554 ( US00081328 ) • ibid.; 22 Mar. 1997 ; Mendum et al. 29182 ( E00057041 ) • ibid.; 23 Mar. 1997 ; Argent et al. 20182 ( L.3805694 ) • Mt Bulusan , Sorsogon ; Dec. 1915 ; Elmer 16074 ( L.2818244 , US00081329 , U.1341267 , P03884333 ) • ibid.; 19 Jun. 1958 ; Sinclair 9624 ( E00631523 ) • Mt Mayon , Albay ; 15 Nov. 1991 ; Reynoso , Romero & Fuentes 3584 ( E00316099 ) • Catanduanes ; 11 Dec. 1917 ; Ramos 30288 ( US00081330 , P03884332 ) • Mt Malinao , Albay ; 29 Oct. 1995 ; Reynoso , Sagcal & Fernando 21406 ( L.3805666 ). Description An erect suffrutescent plant up to 1 m in height. Stems terete with ferruginous hairs all throughout. Leaves opposite, anisophyllous; petioles 4–7 cm long, densely hirsute; blades ca 20 × 12 cm , oblong to oblong-elliptic slightly falcate, apex acute or slightly acuminate, base acute or rounded, pronouncedly asymmetrical, not decurrent, margins denticulate, 10 pairs of lateral veins, curving and uniting at the margin, densely hirsute on both sides; blades of smaller leaves of a pair 6.5–9× 2–2.5 cm , resembling the major leaves in all other respects. Inflorescences cymose, axillary, erect, pedunculate, with 1–3 flowers; peduncle 2–3 cm long, densely hirsute; bracts green, ca 10 × 1 mm , linear lanceolate, densely hirsute on both surfaces, persistent. Calyx tubular, pale green, 20–30 mm long, upper lobes ca 3 mm long, lower lobes ca 7 mm long, acuminate, densely hirsute externally, with glandular hairs internally at base of lobes. Corolla white, 50–65 mm long, funnel-shaped, upper lobes rounded, ca 8× 9 mm , lower and lateral lobes rounded, ca 5× 6 mm , densely hirsute, with glandular hairs internally, lobes slightly recurved. Stamens 2; filaments ca 10 mm long, attached ca 18 mm from base of corolla, sparsely covered with glandular hairs; anthers ca 1.5 mm long, thecae parallel, coherent at apices; staminodes 3, lateral staminodes ca 4 mm long, central staminode ca 1 mm long. Gynoecium ca 25 mm long overall; disc cupular with undulate margin, ca 2 mm long, glabrous; ovary 8–9 mm long, with glandular hairs throughout; style ca 12 mm long, with glandular hairs throughout; stigma bilobed, ca 1 mm across. Fruits lanceolate, green, hirsute, verrucose, 30–40 × 6 mm ; calyx persistent and entirely enclosing the fruit, style persistent. Fig. 3. Leaf similarities. A . C. argentii Olivar, H.J.Atkins & Muellner sp. nov. B . C. ferruginea Merr. C . C. hirtigera H.J.Atkins & Cronk. D . C. villosissima Merr. Photos taken from Co’s Digital Flora with permission ( Pelser et al. 2011 onwards). Distribution and habitat Cyrtandra ferruginea is found growing in damp forests at approximately 500–800 m a.s.l. and can be found on Catanduanes , Mt Isarog, Mt Mayon, Mt Malinao and Mt Bulusan ( Fig. 1 ). Notes Cyrtandra ferruginea is morphologically most similar to C. argentii sp. nov. , but can be separated by the following characters: ferruginous anisophyllous leaves, 1–3 flowered simple cymes, and hirsute corolla.