Polyalthia suthepensis Wiya & Chaowasku, 2021

Wiya, Chattida & Chaowasku, Tanawat, 2021, Disintegration of Polyalthia debilis (Annonaceae): P. cambodica comb. nov., P. canaensis comb. et stat. nov., and P. suthepensis nom. nov. for Unona dubia, Phytotaxa 487 (3), pp. 273-282 : 274

Polyalthia suthepensis Wiya & Chaowasku , nom. nov. ( Figs. 4 , 5 )

Replaced synonym: — Unona dubia Craib (1911: 10)

Homotypic synonym: — Desmos dubius (Craib) Craib (1925: 38) .

Lectotype (designated by Sinclair 1953: 43):— THAILAND. Payap: Chiang Mai Province, Doi Suthep, Kerr 1207 ( K [ K000691671 , K000691672 ]! [= a single specimen composed of two sheets], isolectotypes BM!, C).

Distribution: — Thailand

Etymology: —The epithet refers to the locality (Doi Suthep) where the type specimens of this species were collected.

Notes: —This species is widely distributed in northern, central, eastern, southeastern, southwestern, and southern Thailand; its morphology is somewhat heterogeneous (pers. obs., CW & TC) and, therefore, this name might consist of more than one species, awaiting molecular phylogenetic clarification.

Figures

FIGURE 4. Isolectotype of Unona dubia (BM000546924; = Polyalthia suthepensis, nom. nov.).

FIGURE 5. Pedicellate flowers of Polyalthia suthepensis, nom. nov. in two different stages. A. Submature. B. Male anthesis. Both = Chaowasku 202 [CMUB], collected near the type locality of Unona dubia. Photographs by T. Chaowasku.