Flower morphology of achyranthoids. (A, B) Inflorescences of Pupalia lappacea (Di Vincenzo et al., 301, B) and Cyathula cylindrica (Wondafrash et al., 3332, B) exhibiting modified sterile flowers. (C) Adhesive dispersal unit of Cyathula orthacantha (Di Vincenzo et al., 21, B) with sterile flowers modified to spines. (D) Inflorescence of Achyranthes aspera (Di Vincenzo et al., 9, B), with bracteoles having a thickened spine-like midrib. (E) Partial inflorescence of Cyathula uncinulata (Wondafrash et al., 3199, B) with terminal parts of sterile and fertile flowers modified to hooks. (F) Cyathula cylindrica (Wondafrash et al., 3332, B); cyme of one fertile flower and two lateral modified sterile flowers. (G) Inflorescence of Chionothrix latifolia (Di Vincenzo et al., 236, B) with hairs growing at maturity and serving wind dispersal. (H) Inflorescence of Psilotrichum gnaphalobryum (Di Vincenzo et al., 239B, B) with solitary fertile flowers. Scales bars: (A, B, D, G, H) = 1 cm; (C, E, F) = 2 mm.