Figure 1 from: Vargas-Luna MD, Hernández-Ledesma P, Majure LC, Puente-Martínez R, Macías HMH, Luna RTB (2018) Splitting Echinocactus: morphological and molecular evidence support the recognition of Homalocephala as a distinct genus in the Cacteae. PhytoKeys 111: 31-59. https://doi.org/10.3897/phytokeys.111.26856

Figure 1 Echinocactus species. AE.platyacanthus from Querétaro BE.horizonthalonius from Chihuahua CH.texensis from Chihuahua DH.parryi from Chihuahua EH.polycephalasubsp.polycephala from Sonora FK.grusonii from Querétaro. Line bar in fruit photographs is 1 mm.