Trigonostemon praetervisus Airy Shaw

Yu, R. - Y. & Welzen, P. C. van, 2020, A taxonomic revision of Trigonostemon (Euphorbiaceae) outside Malesia, Blumea 65 (1), pp. 25-52 : 47

32. Trigonostemon praetervisus Airy Shaw — Map 6

Trigonostemon praetervisus Airy Shaw (1982b) 121; N. P. Balakr. & Chakrab. (1991) 625. — Type: Wallich 8001 (holo K, part of the specimen,as it shares the same sheet with Croton chlorocalyx Müll.Arg. , barcode K000246858 ), Bangladesh, Assam , Sylhet .

No material was available, for description seeAiry Shaw (1982b).

Note — The species was described based on incomplete material. There are two sheets of Wallich 8001 in Kew: barcodes K000246857 and K000246858. On the first sheet, a drawing shows 10 fully separate stamens (10 separate filaments can be clearly seen), which is atypical for Trigonostemon ; on the second sheet, there is a mixed assemblage of, as Airy Shaw (1982b) described, Croton chlorocalyx and Trigonostemon praetervisus . However, we were unable to designate a genus to the material. Therefore, the species is treated as doubtful here.

Figures

Map 6 Distribution of Trigonostemon eberhardtii Gagnep. (★), T. montanus R.Y.Yu & Welzen (▲), T. praetervisus Airy Shaw (■) and T. quocensis Gagnep. (X).