FIGURE 4 in Aristolochia crocea, a new species of Aristolochia subsection Pentandrae (Aristolochiaceae) from Guerrero, Mexico

FIGURE 4. Morphologically closest species to Aristolochia crocea. A–B. Aristolochia oaxacana (A. Paizanni-Guillén et al. 249 (IEB)). C. Aristolochia nelsonii. D. Aristolochia variifolia. E–F. Aristolochia versabilifolia (E. A. Paizanni-Guillén & J. M. Ramírez-Amezcua 485 (IEB) and F. A. Paizanni-Guillén et al. 254 (IEB)) Photographs by A. Paizanni Guillén. (A–B, E–F), Samuel Velásquez (C) and Saúl Borja (D).