Tanaecium affine (A.H.Gentry) L.G.Lohmann. Ann. Missouri Bot. Gard. 99: 464. 2014.

Frazao, Annelise & Lohmann, Lucia G., 2019, An updated synopsis of Tanaecium (Bignonieae, Bignoniaceae), PhytoKeys 132, pp. 31-52 : 36

1. Tanaecium affine (A.H.Gentry) L.G.Lohmann. Ann. Missouri Bot. Gard. 99: 464. 2014.

Arrabidaea affinis A.H.Gentry, Novon 2(2): 159. 1992. Type: Ecuador. Sucumbios: Lake Agrio, banks of lake, 250 m, 0°6'45.28"N, 76°54'42.81"W, 1 Apr. 1980, J. Brandbyge and E. Asanza 30393 (holotype, MO [MO-083145]!; isotypes, AAU image!, AAU photo at MO!, NY [NY00000106]!).

Habitat and distribution.

Tanaecium affine is known from humid forests with rich soils, although it has been collected in primary and secondary forests with lateritic soil in Peru (Loreto, Mayanas). It is native from Bolivia (La Paz), Colombia (Antioquia, Boyaca), Ecuador (Napo, Pastaza, Sucumbíos), and Peru (Amazonas, Junín, Loreto, Pasco, Puno).

Phenology.

Flowering: February to April, September and November; fruiting: February to December.

Notes.

This species is morphologically similar to Fridericia florida but differs by the bilabiate calyces, stems with conspicuous patelliform trichomes in the interpetiolar region, and occurrence in rich soils ( Gentry 1992). In addition, T. affine can also be recognized by the numerous peltate trichomes distributed throughout the leaflets, emarginated membrane-like domatia, and fields of patelliform trichomes that cover the inflorescence nodes. Tanaecium affine shares vegetative traits with Tanaecium tetragonolobum , a sympatric species (Tab. 1 ). However, T. tetragonolobum can be differentiated by the glabrous leaflets (vs. leaflets covered with peltate trichomes in T. affine ), petioles longer than petiolules (vs. petioles shorter than petiolules in T. affine ), and subulate prophylls of the axillary buds (vs. bromeliad-like prophylls of the axillary buds in T. affine ).