Plukenetia sinuata Ule, Bot. Jahrb. Syst.

Plukenetia sinuata Ule, Bot. Jahrb. Syst. View in CoL 42 (2–3): 217. 1908.

Anabaenella tamnoides var. sinuata (Ule) Pax & K.Hoffm. in

A.Engler (ed.), Pflanzenr. IV, 147, IX (Heft 68): 27. 1919.

Romanoa tamnoides var. sinuata (Ule) Radcl. -Sm., Kew Bull.

34 (3): 589. 1980. TYPE: BRAZIL. Bahia: Serra do Sao Ignacio,

February 1907, E. Ule 7445 (holotype: B [destroyed];

lectotype designated here: L! [accession 601470, barcode

L 0137705]; isolectotype: HBG [barcode HBG-515848;

image!]).

Notes —Historically, Romanoa tamnoides was thought to be endemic to the Atlantic Forest region of Brazil and Paraguay ( Pax and Hoffmann 1919), but it has since been collected in Bolivia ( Jorgensen et al. 2014). This species has been poorly studied and a revised treatment across its expanded range seems warranted.

Taxonomic Discussion —Originally, two syntypes were designated for Anabaena tamnoides , “Species unica brasiliensis (in Herb. Mus. et J.)” ( Jussieu 1824, p. 47), which refer to Leandro di Saccramento s.n. (P0064583) and herb. Dombey s.n. (P00678933). Radcliffe-Smith (1980) inaccurately cited Dombey s.n. as the holotype of A. tamnoides , which did not qualify as a valid lectotype designation. Both sheets are relatively poor in quality, herb. Dombey s.n. with better preserved leaves and a 3- carpellate fruit, and Leandro di Saccramento s.n. with degraded leaves but more abundant floral material, including intact stylar columns. We select Leandri di Saccramento s.n. as the lectotype since it demonstrates the distinctive pistillate floral morphology of the species and genus. Remaining syntype: BRAZIL. Bre`ısil, herb. Dombey s.n. (P-JU [barcode P00678933; image!]).

Both syntypes of Anabaena tamnoides were annotated as “ Plukenetia occidentalis ” Leandro (in mss.). Jussieu (1824) and Baillon (1858) listed P. occidentalis as a synonym of A. tamnoides ; however, neither case resulted in valid publication of that name (ICN 2017, Art. 36.1; Turland et al. 2018).

Lastly, we designate a lectotype for P. sinuata since the presumed holotype was destroyed in Berlin. Both isotypes have abundant floral material, but our selected lectotype (L0137705) also includes fruit.