Trichomanes tenuifolium 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

Trichomanes tenuifolium Burm. f. , Fl. Ind.: 237. 1768.

≡ Cheilanthes tenuifolia (Burm. f.) Sw. , Syn. Fil.: 129. 1806.

Lectotypus (designated here): SINE PATRIA: sine loco, s.d., Anon. s.n. ( G-PREL [ G00349568 ]!).

Notes. – In the protologue, BURMAN (1768: 237) cited a Pryon specimen, as well as an illustration ( RUMPHIUS, 1750: 77, tab. 34, fig. 2) under the (unnamed) variety β.

MERRILL (1921: 335) referred to the type as “an actual specimen from Pryon, probably of Javan origin”, but unfortunately, no Pryon specimen could be found in G-PREL.

An uncited specimen [G00349568] from unknown origin is however extant in G-PREL and should be regarded as original material; it bears a reference to Rumphius’ illustration in J. Burman’s handwriting with a slip of the pen (tab. 39 instead of tab. 34, the former representing a species of Selaginella P. Beauv. ).

CHAMBERS & FARRANT (1991: 535; 1998b: 278) cited as holotype two collections at G (“T: Planta Zeylanica collection ( Sri Lanka). N.L. Burman (holo: G 1416 [= Gloan number!], 2 sheets”), originated from two different herbaria and both sheets were annotated by T.C. Chambers : 1) the uncited specimen mentioned above (G-PREL [ G00349568 ]); and 2) a Ceylon collection from Houttuyn’s herbarium (see above Introduction), probably collected by Thunberg in the years 1777 – 1778 (G-PREL [ G00349567 ]). Therefore, this typification cannot be accepted.

The lectotypification is based here on the single specimen of original material present in G-PREL [G00349568].