Pyrenacantha lebrunii
Pyrenacantha lebrunii Boutique
Pyrenacantha lebrunii is a species in the family Icacinaceae, native to Cameroon, Gabon, and Zaïre. The fruit is elliptical, with a puberulent epicarp and a persistent calyx. The endocarp is elliptical in shape, with a keel, pitted and ridged outer surface, and a thick wall composed of three cell layers.
Description
The fruit of Pyrenacantha lebrunii is elliptical and acuminate at the apex, with a puberulent epicarp covered in yellow, granular-hair ornamentation. When dry, the epicarp shrivels, revealing the endocarp's reticulate ridges. The mesocarp is 130–300 µm thick when dry. The calyx remains attached to the fruit via a short gynophore. The endocarp is brown, elliptical in lateral view, and lenticular in cross-section, with a surrounding keel. Its outer surface is pitted and ridged, with circular to elongate pits (0.2–0.3 mm in diameter), randomly arranged and associated with spiny tubercles. The tubercles are 836–1500 µm long and 500 µm in base diameter, composed of 22 sclerotic, digitate cells. The endocarp wall is 221–280 µm thick (excluding ridges), with three cell layers: the outermost layer has two rows of isodiametric cells, 11.3–22.2 µm in diameter.
Distribution
Cameroon · Gabon · Zaïre