Abstract
Two new Goniothalamus species (Annonaceae), G.roseipetalussp. nov. and G.sukhirinensissp. nov., are described from the southern limits of Peninsular Thailand (Narathiwat and Yala Provinces). Both new species resemble G.macrophyllus, G.scortechinii and G.uvarioides. The addition of these two new species brings the total number of Goniothalamus species in Thailand to 27. Separate identification keys are provided for flowering and fruiting specimens of the Thai species.
Highlights
The genus Goniothalamus (Blume) Hook.f. & Thomson
Annonoideae tribe Annoneae: Chatrou et al 2012; Guo et al 2017) is widely distributed in lowland and submontane tropical forests across Southeast Asia (Thomas et al 2017). It is characterised by pendent, protogynous flowers with two trimerous petal whorls, with the inner whorl forming a mitriform dome over the reproductive organs
The timing of the petal movements that regulate pollinator trapping and release are synchronised with the circadian rhythms of the beetles (Lau et al 2017; Saunders 2020); this allows the plant to utilise beetles with diverse circadian activities, and allows the staminate floral phase to be extended to promote pollen deposition and enhance interfloral movement of beetles
Summary
A peer-reviewed open-access journal Launched to accelerate biodiversity research. Goniothalamus roseipetalus and G. sukhirinensis (Annonaceae): Two new species from Peninsular Thailand. Academiceditor:ThomasL.P.Couvreur | Received19August2021 | Accepted29September2021 | Published25October2021 Citation: Leeratiwong C, Chalermglin P, Saunders RMK (2021) Goniothalamus roseipetalus and G. sukhirinensis (Annonaceae): Two new species from Peninsular Thailand.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
