Morphological features of Senegalia sect. Monacanthea p.p. A Senegalia × emoryana (Benth.) Britton & Rose habit, New World B S. micrantha (Benth.) Britton & Rose leaf, New World C S. grandistipula (Benth.) Seigler & Ebinger large foliaceous stipules (such stipules not especially common in Senegalia) (Terra 715), New World D Senegalia × emoryana internodal prickles, New World E S. subsessilis Britton & Rose thin-textured fruits, New World F S. sakalava (Drake) Boatwr. globose scarlet inflorescence (scarlet flowers are rare in Senegalia but are found in several species from Madagascar) (Koenen 215), Madagascar G S. pruinescens (Kurz) Maslin, Seigler & Ebinger lianescent shrub habit and terminal paniculate inflorescences (insert of head showing calyx red in upper part) (Maslin 11023), Asia H S. pennata subsp. insuavis (Lace) Maslin, Seigler & Ebinger liana habit (Maslin 11016), Asia I S. menabeensis (Villiers & Du Puy) Boatwr. spicate inflorescences (Du Puy M359), Madagascar J S. rugata (Lam.) Britton & Rose hard-textured pods, Macau, China K S. tonkinensis (I.C. Nielsen) Maslin, Seigler & Ebinger branch showing internodal prickles and two glands on petiole (uncommon in Senegalia) (Maslin 11041), Asia. Photo credits A, B, D, E, H B Maslin C V Terra F E Koenen G, K L Bai I D Du Puy J L-x Yuan.