Habit and armature of the genera of the Neltuma clade A shrub of Xerocladia viridiramis Taub. in the Namib desert, Namibia B small tree of Strombocarpa tamarugo (Phil.) C.E Hughes & G.P. Lewis, on the Pampa del Tamarugal in the Atacama desert, northern Chile C shrubby treelet of Strombocarpa ferox (Griseb.) C.E. Hughes & G.P. Lewis in seasonally dry tropical scrubland in southern Bolivia D small tree of Neltuma kuntzei (Harms ex C.E.O. Kuntze) C.E. Hughes & G.P. Lewis in seasonally dry tropical forest in southern Bolivia E small tree of Neltuma juliflora (Sw.) Raf. in seasonally dry tropical scrubland on deep black vertisol soil in central Nicaragua F straight cylindrical spinescent shoots of the sub-aphyllous Neltuma kuntzei G short recurved stipular spines and unijugate leaves of Xerocladia viridiramis H slender pale whitish stipular spines, unijugate leaves, and globose to ovoid-elliptic capitula of Strombocarpa strombulifera (Lam.) A. Gray I axillary nodal spine of Neltuma juliflora, central Nicaragua. Photo credits A H Kolberg, Plants of Namibia https://herbaria.plants.ox.ac.uk/bol/Namibia B O Whaley C–F, I CE Hughes G GN Dreber https://www.southernafricanplants.net/plantdata_sub.php?Mspec_ID=6570 H Guillermo Debandi, iNaturalist (https://guatemala.inaturalist.org/photos/1502506).