Evolution of different types of armature across Caesalpinioideae. Character states were defined as: unarmed; nodal or internodal prickles on stem; stipular spines; nodal axillary thorns including modified inflorescence axes of Chloroleucon; spinescent shoots. Branch lengths are not informative in this figure. Photos a and b axillary thorns a Parkinsonia andicola (Griseb.) Varjão & Mansano b Prosopis juliflora (Sw.) DC. c, d, h internodal prickles c Senegalia tamarindifolia (L.) Britton & Rose d Mimosa ophthalmocentra Mart. ex Benth. e spinescent shoots, Prosopis kuntzei Harms f and g stipular spines f Prosopis ferox Griseb. g Vachellia cornigera (L.) Seigler & Ebinger h Cylicodiscus gabunensis Harms. All photos Colin Hughes, except h William Hawthorne.

  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