Evolution of types of floral heteromorphy across the mimosoid clade. Character states were defined as: homomorphic, i.e. with no conspicuous modification or variation amongst flowers within an inflorescence (here we include inflorescences that can comprise proportions of male and bisexual flowers, but no other more conspicuous variation); heteromorphic 1 = basal flowers of the inflorescence with showy staminodia; heteromorphic 2 = flowers dimorphic within an inflorescence, the central flower (or flowers) enlarged/sessile cf. the peripheral (sometimes pedicellate) flowers. Branch lengths are not informative in this figure. Photos a–h heteromorphic 1 a Neptunia plena (L.) Benth. b Dichrostachys cinerea (L.) Wight & Arn. c Dichrostachys myriophylla Baker d Gagnebina pterocarpa (Lam.) Baill. e Dichrostachys bernieriana Baill. f Dichrostachys akataensis Villiers g Parkia bahiae H.C. Hopkins h Parkia nitida Miq. i–l heteromorphic 2 i Pseudosamanea guachapele (Kunth) Harms j Albizia obliquifoliolata De Wild. k Hydrochorea corymbosa (Rich.) Barneby & J.W. Grimes l Albizia grandibracteata Taub. Photos a, b, g, i Colin Hughes c, k, l Erik Koenen d Melissa Luckow e, f Dave Du Puy h Giacomo Sellan https://identify.plantnet.org/the-plant-list/observations/1012799991 j Jan Wieringa.

  Part of: Ringelberg JJ, Koenen EJM, Iganci JR, de Queiroz LP, Murphy DJ, Gaudeul M, Bruneau A, Luckow M, Lewis GP, Hughes CE (2022) Phylogenomic analysis of 997 nuclear genes reveals the need for extensive generic re-delimitation in Caesalpinioideae (Leguminosae). In: Hughes CE, de Queiroz LP, Lewis GP (Eds) Advances in Legume Systematics 14. Classification of Caesalpinioideae Part 1: New generic delimitations. PhytoKeys 205: 3-58. https://doi.org/10.3897/phytokeys.205.85866