Goniothalamus calvicarpus Craib, 1922

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 calvicarpus Craib Fig. 2 (A-D)

Goniothalamus calvicarpus Craib, Bull. Misc. Inform. Kew. 1922: 227 (1922). - TYPE: Thailand: Sukotai, Kao Luang, Sukhothai Province, Northern Thailand, 4 May 1922, A.F.G. Kerr 5946 (holotype: K!; isotypes: BK!, BM!).

Distribution and habitat.

Thailand ( Saunders and Chalermglin 2008), China ( Li et al. 2011) and Northern Laos (Luang Namtha Province), mountain slopes, 800-1500 m.

Specimens examined.

Laos: Tha Se Village, Nam Ha National Biodiversity Conservation Area, Luang Namtha Province, Northern Laos, tropical lower montane forest, 938 m, 20°49'59.42"N, 101°15'48.05"E, 21 Oct 2018, Y.H. Tan et al., L0757 (HITBC); idem, 21 Oct 2018, Y.H. Tan et al., L0764 (HITBC); idem, 26 Mar 2018, Y.H. Tan et al., L0183 (HITBC); Nam Sing Village, Nam Ha National Biodiversity Conservation Area, Luang Namtha Province, Northern Laos, stone forest, 900 m, 20°45'09"N, 101°12'08"E, 25 Mar 2018, Y.H. Tan et al., L0153 (HITBC).

Notes.

There has been considerable taxonomic confusion between G. calvicarpus and G. griffithii Hook. f. & Thomson ( Saunders and Chalermglin 2008), the Chinese material identified as G. griffithii to be more correctly placed in G. calvicarpus ( Saunders and Chalermglin 2008; Li et al. 2011). Goniothalamus calvicarpus is relatively widely distributed in the lower mountain evergreen forest in Xishuangbanna, southern Yunnan, compared with our materials collected in Northern Laos, the characters of flowers and fruits are exactly in line with G. calvicarpus ; it is also not very hard to encounter around the adjacent areas in Northern Laos bordering southern Yunnan.

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.