Pyrenacantha cordicula Villiers, 1973

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 : 77

Pyrenacantha cordicula Villiers

Fig. 25.1–25.9

Material examined

Specimen used for endocarp and fruit description

CAMEROON • 1986; M. Etuge & D. Thomas 28; P [ MNHN-P-P00557873 ].

Description

FRUIT. Elliptical, slightly accrescent at the apex. Epicarp puberulent with yellow simple hairs with granular ornamentation, shriveled when dry. Mesocarp 225–425 µm thick when dry. Calyx persistent, separated from the fruit by a small gynophore. Length 17 mm, width 11.6 mm, thickness 9.3 mm.

ENDOCARP. Brown, elliptical to obovoid in lateral view, lenticular in transverse section, length ca 12 mm, width ca 8 mm, thickness ca 5 mm. Trace of keel present in the upper part. Apex with acute protuberance, asymmetrical in lateral view; base rounded, symmetrical. Outer surface of the endocarp pitted and ridged. Pits primarily elongate, occasionally circular, 0.6–1.3 mm in length, arranged in longitudinal lines with 6–7 pits longitudinally and transversally (ca 40–45 pits per face). Pits associated with cylindrical tubercles protruding into the locule; tubercles ca 2.5 mm in length and 1 mm in diameter at the base, capitate at the apex, with ca 45 cells in width. Tubercle cells sclerotic, digitate and elongate. Ridges rounded and large, delimiting a dense reticulum enclosing all pits in an areole. Endocarp wall 332–438 µm thick (excluding pits). Endocarp wall (excluding pits) with three cell layers: outermost layer with 1–2 rows of isodiametric to periclinally oriented cells, cells 8.6–10.7 µm in width, followed by a layer with ca 17 rows of periclinally oriented cells, cells 9.5–25.3 µm in width; innermost layer with one row of periclinally oriented cells, cells 5.5–5.8 µm in width, lining the locule surface with more or less flattened cells. Locule surface not lacunate.