Figure 3 from: Wagner W, Clark J, Lorence D (2014) Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67. https://doi.org/10.3897/phytokeys.38.7609

Figure 3 - Bidens beckiana (F. Br.) Sherff (A–B). A Distal part of plant B Head post-flowering showing involucral bracts and apex of achenes. Drawn from Florence 9368 (US) [A] and Perlman 10064 (US) [B]. Bidens cordifolia Sch. Bip. (C–D). C Distal part of plant D Head post-flowering showing involucral bracts. Drawn from Wood & Perlman 4600 (US). Bidens polycephala Sch. Bip. (E–F). E Distal part of plant F Head post-flowering showing involucral bracts and apex of achenes. Drawn from Perlman 15878 (US). Image from field shots used to augment illustration of Wood 10504.