Rubus taiwanicola vs. Rubus taiwanicolus

Although the issue of species epithet ending with -cola is a bit controversial, Nicolson (1987) suggested that the usage better follow the original publication of the name to avoid confusion, and provided a detailed discussion about its usage and controversy.

Nicolson, D.H. (1987), Species Epithets Ending in -cola, a Retraction concerning -colus, -colum. TAXON, 36: 742-745. https://doi.org/10.2307/1221127

The protologue of Rubus taiwanicola Koidz. & Ohwi:
https://www.jstage.jst.go.jp/article/jjapbot/12/9/12_12_9_1796/_pdf/-char/en (page. 657)

The name Rubus taiwanicola is accepted by:

IPNI:
https://www.ipni.org/n/740736-1

POWO:
https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:740736-1