Pteris ensiformis Burm. f.,

Mazumdar, Jaideep, Callmander, Martin W. & Fumeaux, Nicolas, 2019, Typification and nomenclature of the ferns described in N. L. Burman’s Flora Indica, Candollea 74 (1), pp. 93-109 : 106

Pteris ensiformis Burm. f., Fl. Ind.: 230. 1768.

Lectotypus (designated here): INDONESIA. Java: s.d., Pryon s.n. ( G-PREL [ G00360108 ]!).

Notes. – In the protologue, BURMAN (1768: 230) cited two illustrations ( BURMAN, 1737: tab. 87; PLUKENET, 1705: tab. 407, fig. 2) and a Pryon collection from Java. The latter, extant in G-PREL, is designated here as the lectotype.

FRASER-JENKINS et al. (2017: 286) designated as lectotype a Pieter Hertog collection from Ceylon (G-PREL [G00360109]), annotated by C.V. Morton as holotype. It was cited by Burman’s father ( BURMAN, 1737) in the Thesaurus Zeylanicus and is the basis for plate 87 in the same work, precisely the plate mentioned by Burman in the Flora Indica. Unfortunately, as Hertog’s specimen was not cited by BURMAN (1768: 230), unlike Pryon’s (see above), this lectotypification cannot be accepted ( TURLAND et al., 2018: Art. 9.12). DAS et al. (2018: 286) provided a superfluous second-step lectotypification based on the same specimen, apparently overlooking that FRASER-JENKINS et al. (2017: 286) already unambiguously designated a single specimen (“[...] Polypodium zeylanicum etc. Herbier Delessert collection Burman, Holotypus, det. C.V. Morton [...]”).