Tuesday, March 18, 2014

[Botany • 2013] Goniothalamus palawanensis • A new species of Goniothalamus (Annonaceae) from Palawan, and a new nomenclatural combination in the genus from Fiji


Goniothalamus palawanensis
C.C.Tang & R.M.K.Saunders

Abstract
A new species, Goniothalamus palawanensis C.C.Tang & R.M.K.Saunders, sp. nov. (Annonaceae), is described from Palawan, Philippines. Goniothalamus palawanensis is most closely related to Goniothalamus amuyon (Blanco) Merr., but differs in its shorter inner petals, hairy ovaries, and funnel-shaped stigmas. A new nomenclatural combination, Goniothalamus angustifolius (A.C.Sm.) B.Xue & R.M.K.Saunders, comb. nov., is furthermore validated to reflect the phylogenetic affinities of a Fijian species previously assigned to Polyalthia.

Keywords: GoniothalamusPolyalthia, Fiji, Malesia, Melanesia, Palawan, new combination, new species


Figure 1. Goniothalamus palawanensis, sp. nov.
A Habit (mature individual with flowers) B Branch with leaves (abaxial) C Branch with leaves (adaxial) D, E Flower F Sepals (abaxial) G Very mature flower with two outer petals and one inner petal removed, showing stamens and stigmas H Perianth parts (abaxial; left to right: sepal, inner petal, outer petal) I Perianth parts (adaxial; left to right: sepal, inner petal, outer petal).
Scale bars: H, I = 1 cm; A, D from C.C. Tang 09 (HKU); B, C, F, G from C.C. Tang 06 (HKU); E, H, I from C.C. Tang 14 (HKU). Photos by C.C. Tang.


Chin Cheung Tang, Bine Xue, Richard M.K. Saunders. 2013. A new species of Goniothalamus (Annonaceae) from Palawan, and a new nomenclatural combination in the genus from Fiji. PhytoKeys. 32: 27–35, doi: dx.doi.org/10.3897/phytokeys.32.6663

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