Pyrenacantha macrocarpa (A.Chev. ex Hutch. & Dalziel) Byng & Utteridge, 2014

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 : 86-87

Pyrenacantha macrocarpa (A.Chev. ex Hutch. & Dalziel) Byng & Utteridge

Fig. 28.1–28.8

Material examined

Specimens used for endocarp and fruit description

IVORY COAST • Abidjan; s.d.; J. de Koning 4918; BR [ BR0000015570635 ] • 1954; N. Lovi 3952; P [ MNHN-P-P04494747 ].

Other material

IVORY COAST • 1907; A. Chevalier 17216; P [ MNHN-P-P00418166 ].

GHANA • 1999; J. Stone, J. Amponsah & M. Chintoh 3421; P [ MNHN-P-P06807826 ].

Description

FRUIT. Elliptical, accrescent at the apex and forming an inflated cap (representing about half of the length). Epicarp pilose, with long and thin hairs and yellow-white simple hairs with granular ornamentation. Mesocarp thin when dry. Calyx persistent, separated from the fruit by a more or less elongated gynophore. Length 42.4–70.0 mm, width 20–25 mm, thickness 9–10 mm.

ENDOCARP. Cream, deltoid in lateral view, lenticular in transverse section, length ca 20.6 mm, width ca 16.4 mm, thickness ca 9.5 mm. Keel surrounding the endocarp in the plane of symmetry. Apex truncate and slightly asymmetrical, with protuberance; base rounded, almost acute, symmetrical. Outer surface of the endocarp pitted and ridged. Pits circular, occasionally elongate, 0.5–1.6 mm in diameter, arranged in longitudinal lines with 9–10 pits longitudinally and 8–9 pits transversally (ca 83–84 pits per face). Pits associated with elongate-flattened tubercles protruding into the locule; tubercles ca 710–1084 µm in length and 227–279 µm in diameter at the base. Ridges rounded-rectangular, thin, delimiting a dense reticulum enclosing all pits in an areole. Endocarp wall 534 µm thick excluding pits. Endocarp wall (excluding pits) with three cell layers poorly preserved except for the innermost layer including one row of periclinally oriented cells, cells 3.3–10.5 µm in width, lining the locule surface with inflated cells. Locule surface not lacunate.

Remarks

Endocarp wall poorly preserved in the specimens examined due to the preparation (see Discussion for preservation issues).