I made these illustrations for the Conservatoire et Jardin Botaniques de Genève. They were published with the description of the species in:

LUINO, I., M.W. CALLMANDER, O. PONCY, S. DA-GIAU & L. GAUTIER (2016). “A new Pararistolochia Hutch. & Dalziel (Aristolochiaceae) from the Beanka tsingy (western Madagascar).” Candollea 71(1): 135-141.

An eprint is available at:

http://www.ville-ge.ch/cjb/publications/cando711/c2016v711a16.pdf