Diagram of a longitudinal section of Cryptostegia grandiflora (left) and C. madagascariensis (right) flowers; showing the corolline corona (G) in C. grandiflora, with bifid lobes converging at the tips and hiding the anthers (A) and stigma (S) – hence the generic descriptor – whilst those of C. madagascariensis are entire and separate. C = calyx, N = nectary, O = ovary, P = corolla lobes; ex Curtis (1946).

  Part of: Seier MK, Rapini A, Pollard KM, Barreto RW, Evans HC (2023) Tracing the origins and tracking the movements of invasive rubber vines (Cryptostegia spp., Apocynaceae). NeoBiota 89: 95-133. https://doi.org/10.3897/neobiota.89.109180