Oberonia complanata (A.Cunn.) M.A.Clem. & D.L.Jones

Geiger, D. L., 2019, Studies on Oberonia 5 (Orchidaceae: Malaxideae). Twenty-four new synonyms, and a corrected spelling, Blumea 64 (2), pp. 123-139 : 126

Oberonia complanata (A.Cunn.) M.A.Clem. & D.L.Jones — Fig. 3

Oberonia complanata (A.Cunn.) M.A.Clem.& D.L.Jones (in Clements 1989). Basionym: Dendrobium complanatum A.Cunn.(1839) 34. — Type: A. Cunningham s.n., (syn not found: Clements 1989), Moreton Bay. J.R. Clarkson & T.D. Stanley 832 (neo, designated by Clements & Jones in Clements 1989: BRI AQ0268526), Australia, Queensland, Shoalwater Bay Military Reserve, Creek below abandoned sawmill on CSIRO ISOPOD site, c. 3 km NE of Mt Parnassus.

Oberonia flavescens D.L.Jones & M.A.Clem.(2006) 10, f. 1.12,pl. 1, f. 1e–f. — Type: D.L. Jones 19354 (in cult.) (holo CANB 751060 ), original collection B. Gray 8640, Australian National Botanic Gardens, Canberra, from plant collected from Australia, Queensland, McIlwraith Range , Pandanus Creek , syn. nov.

Notes — Oberonia flavescens is here synonymised under O. complanata . The shared similarities include the straw coloured lip with serrated lateral lobes and small pointed apical lobes, and the uncommon oblique orientation of the flowers along the rachis. The drawings suggest that the lip is more T-shaped in O. flavescens compared to the more V-shaped lip of O. complanata . The T-shaped lip of O. flavescens is not evident in the scanning electron micrographs of the protologue (pl. 1, f. e–f), nor in other material of the two names identified by the original authors of O. flavescens ( Fig. 3 ). The indicated differences in the serration pattern or the length to width ratio of the lip are not holding up to scrutiny once multiple samples are examined. The only difference is the ~20 % smaller size of O. flavescens . Such size differences are known from other species and are here considered taxonomically insignificant; they were not mentioned in the protologue of O. flavescens .

Figures

Fig. 3 Oberonia complanata flowers.a–b,e–g. Oberonia complanata (A.Cunn.) M.A.Clem.& D.L.Jones;c–d,h–i. Oberonia flavescens D.L.Jones & M.A.Clem.; a–d. frontal; e, h. oblique; f, i. lateral; g. top (a, e–g: CANB 9306467; b: CANB 9614282; c, h–i: CANB 891126; d: CANB 650606). — Scale bar = 1 mm.