Pseudosamanea carbonaria (Britton) E.J.M. Koenen, 2022

Koenen, Erik J. M., 2022, On the taxonomic affinity of Albizia carbonaria Britton (Leguminosae, Caesalpinioideae - mimosoid clade), PhytoKeys 205, pp. 363-370 : 363

Pseudosamanea carbonaria (Britton) E.J.M. Koenen comb.nov.

Fig. 1A-D

Albizia carbonaria Britton, Sci. Surv. Porto Rico & Virgin Islands 6: 348. 1926. Basionym

Albizia malacocarpa Standl. ex Britton & Rose, N. Amer. Fl. 23: 44. 1928. - Types: Calderón 2024 (lectotype: NY, [NY00001767], chosen here; isolectotypes: US, [US00000471], GH [GH00069258]); Williams 952 (paratype: NY, [NY01300065]).

Albizia sumatrana Steenis, in Encycl. Ned.-Ind. ed. 2, Suppl. Vol. vi. 864. 1931. - Type: Keuchenius s.n. (holotype: BO, isotypes: A, [A00058480]; A, [A00058481]; BO).

Pithecellobium carbonarium (Britton) Niezgoda & Nevling, Phytologia 44: 310. 1979.

Albizia filicina Standl. & L.O. Williams ex L. Holdridge & Poveda, Arboles de Costa Rica 1: 134. 1975. nomen nudum.

Type.

C.L. Bates s.n. (holotype: NY, [NY00001778]; isotype: K!, [K000528017]).

Pseudosamanea carbonaria can easily be distinguished from the other two currently known species of Pseudosamanea by having 8-13 pairs of pinnae and (18-)20-30 leaflet pairs, compared to 3-6 pairs of pinnae and 5-8 leaflet pairs, as well as leaflet size (the larger ones 4.5-8 mm long vs. 23-50 mm) and flower size (corolla of peripheral flowers (4-)4.4-6.4 mm long vs 9.5-11 mm in Ps. guachapele and 11-13 mm in Ps. cubana ; the stamen filaments 13-16.5 mm vs. 41-45 mm in Ps. guachapele and 25-27 mm in Ps. cubana ) and fruit size 7-12 × 1.5-2.35 cm long (excluding the stipe) vs. c. 12-22 × 2-4.5 cm in the other two species. [All measurements taken from Barneby and Grimes (1996)].

Representative material studied.

Ps. carbonaria : Colombia: G.P. Lewis 3862 (K, 2 sheets, fls & frts), R.T. Pennington 694 (K, fls), H.P. Fuchs & L. Zanella 22388 (K, fls); Peru: A. Daza & T.D. Pennington 16353 (K, fls & frts), E. Suclli & J. Farfán 1258 (K, 2 sheets, fls & frts).

Ps. guachapele : Mexico: C.E. Hughes 665 (K, frts), E.A. Pérez-García 1035 (K, fls); Honduras: C.E. Hughes & B.T. Styles 117 (K, frts), C.E. Hughes 753 (K, fls). Guatemala: D.J. Macqueen 68 (K, fls & frts), C.E. Hughes 1103 (K, fls).

To identify the species of the genus Pseudosamanea , the following identification key, based on that of Barneby and Grimes (1996), but with an additional identification step to include Ps. carbonaria , can be used:

Figures

Figure 1. A-D Pseudosamanea carbonaria (Britton) E. J. M. Koenen A habit B trunk with exfoliating bark C inflorescences D pods E-I Pseudosamanea guachapele E habit F inflorescences G trunk with exfoliating bark H close-up of strongly heteromorphic inflorescence typical of the genus I pod A Bioexploradores Farallones B Karen Osorio C Juan Manuel de Roux D Juan Carlos Delgado Madrid E, H Colin Hughes F Cynthia Tercero G Bribrabrico I Daniel H Janzen A, B, C, D, F, G, I from https: // www. gbif. org, distributed under a Creative Commons BY-NC-SA 3.0 License.