Icacina oliviformis (Poir.) J.Raynal

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 : 30

Icacina oliviformis (Poir.) J.Raynal

Fig. 11.10–11.18

Material examined

Specimen used for endocarp and fruit description

REPUBLIC OF THE CONGO • 1892; M. Dybowski 698; P[ MNHN-P-P04495750 ].

Other material

CENTRAL AFRICAN REPUBLIC • 1978; Peyre de Fabrègues 3610; P[ MNHN-P-P04495743 ].

SENEGAL • 1933–1934; J. Trochain 3367; P [MNHN-P-P04495790] .

Description

FRUIT. Elliptical, red-brown when mature. Epicarp puberulent with small ovoid hairs with an acuminate apex. Mesocarp 420–620 µm thick when dry. Length 17–23 mm, width 13–16 mm, thickness 9–14 mm.

ENDOCARP. Elliptical in lateral view, globose in transverse section, length ca 18 mm, width ca 13.1 mm, thickness ca 14 mm. Keel running along the dorsal length of the endocarp, flanked by two channels, with the vascular bundle embedded within keel/ endocarp wall; a single channel runs along the ventral length of the endocarp. Apex truncate; base rounded-acute and slightly asymmetrical. Outer surface of the endocarp rugose with ca 70–80 mounds, more or less square-polygonal, with a freely ending channels inside, more or less branched. Mounds organized in 7–8 longitudinal lines separated by three main longitudinal channels. The main channel on each face reaching a pore positioned subapically, each pore with a central pit. Vasculature of the endocarp resting in the channels between mounds and along the channel branches inside the mounds. Endocarp wall 288–307 µm thick excluding mounds (588–661 µm including mounds). Endocarp wall with two cell layers: outermost layer with 7–8 rows of anticlinally oriented to isodiametric cells, cells 24–34 µm in width; innermost layer with 8–9 rows of periclinally oriented cells, cells 16–21 µm in width. Locule surface smooth, lacunate.