Icacina

Rio, Cédric Del, Stull, Gregory W. & Franceschi, Dario De, 2020, Survey of the fruits and endocarps of Icacinaceae (Lamiids, Icacinales), European Journal of Taxonomy 645, pp. 1-130 : 26

Key to the genus Icacina

1. Keel surrounding the endocarp clearly visible, ornamentation rugose with numerous mounds ...... 2 – Keel faintly apparent, ornamentation ridged .................................................................................... 3

2. Apex truncate, endocarp length ca 18 mm .......................................... I. oliviformis (Poir.) J.Raynal – Apex acute, endocarp length ca 25 mm ...................................................................... I. mannii Oliv.

3. Ridges sharp, reticulate ..................................................................................................................... 4 – Ridges rounded, not reticulate ............................................................................ I. guessfeldtii Asch.

4. Ridges up to 430 µm thick, keel faintly apparent, vascular bundle outside the endocarp wall .......... ......................................................................................................................... I. claessensii De Wild.

– Ridges up to 730 µm thick, keel thick, vascular bundle within the endocarp wall ............................ .................................................................................................................................. I. trichanta Oliv.