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| Goniothalamus saccopetaloides Y.H.Tan & Bin Yang, in Yang, Zhu, Ding, Bouamanivong & Tan, 2020. |
Abstract
Goniothalamus saccopetaloides Y.H. Tan & Bin Yang, a new species is described and illustrated from Laos. This species shows morphological similarities to G. yunnanensis W.T. Wang, but it differs from the latter by having almost fleshy, involute and saccate outer petals, subglobose monocarps, and single seeded monocarps. Goniothalamus cheliensis, and G. calvicarpus are new records for the Flora of Lao PDR. A key to Goniothalamus species indigenous to Laos is provided here.
Keywords: Goniothalamus, Laos, field survey, new species, new record
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Goniothalamus saccopetaloides Y.H.Tan & Bin Yang, sp. nov. A habit B leafy branch C flowers on main trunk D fruits on main trunk E leaves (adaxial and abaxial surface) F flowers G–H dissected flowers I carpels J longitudinally dissected monocarp K seeds. Photographed by R.B. Zhu and B. Yang. |
Goniothalamus saccopetaloides Y.H.Tan & Bin Yang, sp. nov.
Diagnosis: Goniothalamus saccopetaloides is morphologically similar to G. yunnanensis W.T. Wang with elliptic-oblong to oblong leaf blades and broadly lanceolate, pinkish orange to reddish brown outer petals, but easily distinguished by having almost fleshy, involute, saccate outer petals, subglobose and single seeded monocarps.
Etymology: The new species is named after its saccate and almost fleshy outer petals.
Bin Yang, Ren-Bin Zhu, Hong-Bo Ding, Somsanith Bouamanivong and Yun-Hong Tan. 2020. A New Species and Two New Records of Goniothalamus (Annonaceae) from Lao PDR. In: Jin X-H, Xia N-H, Tan Y-H (Eds) Plant Diversity of Southeast Asia-II. PhytoKeys. 138; 17-25. DOI: 10.3897/phytokeys.138.38995
