Palicourea longiinvolucrata A. C. Berger, 2017

Berger, Andreas, 2017, Two new combinations, lectotypifications and a new name for Costa Rican Palicourea s. l., PhytoKeys 80, pp. 53-63 : 53

Palicourea longiinvolucrata A. C. Berger nom. nov.

Psychotria hispidula Basionym/replaced synonym. Standl. ex Steyerm., Acta Biol. Venez. 4(1): 97-98, 1964. ≡ Palicourea hispidula (Standl. ex Steyerm.) Borhidi, Acta Bot. Hung. 59(1-2):17, 2017a, nom. illeg. hom., non Palicourea hispidula Standl., Publ. Field Mus. Nat. Hist., Bot. Ser. 11(5): 227, 1936.- Type: COLOMBIA. Valle del Cauca: Río Calima, La Trojita, 5-50 m, 19 Feb-10 Mar 1944, J. Cuatrecasas 16359 (holotype: F barcode V0070450F!; isotypes: BC 623883!, U barcode 0006197!, US barcode 00138790!, VEN n.v.).

Psychotria involucrata - sensu Standley (1938, p.p.), non Sw., nom. superfl.

Psychotria hoffmannseggiana - sensu Burger & Taylor (1993, p.p.), non (Roem. & Schult.) Müll. Arg.

Nomenclatural remarks.

Borhidi (2017a) attempted to transfer this species to Palicourea , but overlooked the preexisting Palicourea hispidula Standl. This renders his name an illegitimate later homonym (ICN, Art. 53.1). Here, the new name Palicourea longiinvolucrata is proposed that alludes to the long involucral (15-20 mm) and floral bracts (6-15 mm) that help differentiate this species from the closely related Palicourea hoffmannseggiana (Roem. & Schult.) Borhidi (3.5-15 mm, 0.5-2 mm). Two further species, Palicourea gracilenta ( Müll. Arg.) Delprete & J. H. Kirkbr. (3-7 mm, 1.5-5 mm) and Palicourea winkleri Borhidi (both 1-9 mm), belong to the same species group (e.g., Taylor 2004, 2014), but have less-congested inflorescences (Figure 1 ).

Distribution.

Palicourea longiinvolucrata is known from Belize to Bolivia, from Venezuela and from Brazil ( Taylor 2014).

Figures

Figure 1. Palicourea longiinvolucrata and related species, note diagnostic differences in bract arrangement and length. Palicourea longiinvolucrata, inflorescence (A Berger 1418) and infructescence (B Berger 1633); Palicourea hoffmannseggiana, infructescence (C unvouchered); Palicourea gracilenta, infructescence (D Berger 2055); Palicourea winkleri, infructescence (E Berger 1737). All photos by the author.