Goniothalamus cheliensis Hu, 1940

Yang, Bin, Zhu, Ren-Bin, Ding, Hong-Bo, Bouamanivong, Somsanith & Tan, Yun-Hong, 2020, A new species and two new records of Goniothalamus (Annonaceae) from Lao PDR, PhytoKeys 138, pp. 17-25 : 17

Goniothalamus cheliensis Hu Fig. 2 (E-I)

Goniothalamus cheliensis Hu, Bull. Fan Mem. Inst. Biol. 10: 122 (1940). - TYPE: China: Che-Li Hsien, Maan-Shang, Yunnan, Sep. 1936, C.W. Wang 78573 (holotype: TAI!, isotypes: A!, IBSC!].

Distribution and habitat.

Northern Thailand ( Saunders and Chalermglin 2008), China ( Li et al. 2011) and Northern Laos (Oudomxay Province), Montane forests; 1000-1500 m.

Specimens examined.

Laos: Maung Xai, Phou Hin Phee National Biodiversity Conservation Area, Oudomxay province, 1357 m, 20°43'19.12"N, 102°08'46.61"E, 30 March 2018, Y.H. Tan et al., L0350 (HITBC); ibdem, 1372 m, 20°43'18.24"N, 102°08'47.31"E, 30 March 2018, Y.H. Tan et al., L0351 (HITBC).

Notes.

Goniothalamus cheliensis is a very distinctive species, with leaves, flowers and fruits very large and densely rust-colored hirsute ( Saunders and Chalermglin 2008), according to our personal observation, the monocarps of G. cheliensis can be up to 15 cm long.

With the addition of Goniothalamus saccopetaloides , Goniothalamus cheliensis , and Goniothalamus calvicarpus , seven species are currently recognized in Laos ( Newman et al. 2007; Saunders and Chalermglin 2008; Li et al. 2011; Lee 2016). A key is provided below to further elucidate the morphological differences among the species occurring in Laos.

Key to the Goniothalamus species in Laos and along with G. yunnanensis

Figures

Figure 2. Goniothalamus calvicarpu s Craib A leafy branch B leaves (abaxial) C fruit D flower (epibiotic sepels); Goniothalamus cheliensis Hu E leafy branch F leaves (abaxial) G flower H flower (picked petals, showing stamens and carpels) I dissected flowers. Photographed by H. B. Ding.