Icacina trichantha Oliv.

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 : 30-31

Icacina trichantha Oliv.

Fig. 11.19–11.27

Material examined

Specimen used for endocarp and fruit description

NIGERIA • 1955; J.C. Okafor fhi 34969; P[ MNHN-P-P04495708 ].

Description

FRUIT. Elliptical, brown-black when mature. Epicarp puberulent with yellow simple hairs, reticulate when dry, revealing the underlying reticulum of endocarp ridges. Mesocarp ca 300 µm thick when dry. Length 30.8–34.0 mm, width 17–24 mm, thickness 12.0– 18.7 mm.

ENDOCARP. Elliptical in lateral view, globose in transverse section, length ca 27.4 mm, width ca 17 mm, thickness ca 14 mm. Keel surrounding the endocarp in the plane of symmetry, with the thicker margin containing a vascular bundle embedded within the endocarp wall. Apex greatly asymmetrical in lateral view; base rounded, slightly asymmetrical. Outer surface of the endocarp ridged, with ca four main ridges, two lateral ridges reaching the point of the base. Ridges sharp and rectangular with a median channel, delimiting a reticulate pattern well developed in the upper half of the endocarp and more diffuse in the lower half. The reticulum encloses 10–20 irregular, more or less polygonal areoles with freely ending ridgelets inside. Endocarp possessing a symmetrical pair of pores compressed on the keel, positioned eccentrically and subapically on the endocarp faces, each with a central pit. Endocarp wall 270–315 µm thick excluding ridges (362–735 µm including ridges). Vasculature of the endocarp resting in the channels of the ridges. Endocarp wall with three cell layers: outermost layer with 4–6 rows of anticlinally oriented to isodiametric cells, cells 19–30 µm in length; middle layer with 4–8 rows of periclinally oriented cells, cells 20–27 µm in width; innermost layer with one row of periclinally oriented cells, which line the locule surface with inflated cells, cells 8–13 µm in width. Locule surface smooth, lacunate.