Pyrenacantha klaineana Pierre ex Exell & Mendonça, 1951

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 : 82-83

Pyrenacantha klaineana Pierre ex Exell & Mendonça

Fig. 26.19–26.27

Material examined

Specimen used for endocarp and fruit description

IVORY COAST • 1962; A.J.M. Leewenber 4523; P [ MNHN-P-P04495495 ].

Other material

GABON • s.d.; R.P. Klaine 1299; P [ MNHN-P-P04495499 ] • 1899; R.P. Klaine 1383; P [ MNHN- P-P04495503 ].

Description

FRUIT. Elliptical, accrescent at the apex, black when mature. Epicarp puberulent, with yellow simple hairs with granular ornamentation, shriveled when dry. Calyx persistent, separated from the fruit by an elongated gynophore. Length 20–25 mm, width 11–16 mm, thickness 7–9 mm.

ENDOCARP. Cream, elliptical in lateral view, lenticular in transverse section, length ca 17.9 mm, width ca 9.5 mm, thickness ca 7 mm. No keel surrounding the endocarp in the plane of symmetry. Apex and base rounded, symmetrical or slightly asymmetrical in lateral view. Outer surface of the endocarp pitted. Pits circular, occasionally elongate, 0.1–0.3 mm in diameter, randomly arranged with 18–19 pits longitudinally and 12–17 pits transversally (ca 242 pits per face). Pits associated with peg-shaped tubercles protruding into the locule; tubercles ca 698–982 µm in length and 388–576 µm in diameter at the base, bifid and / or capitate at the apex, with 16–17 cells in width. Tubercle cells sclerotic, digitate and elongate. Endocarp wall 130–185 µm thick (excluding pits). Endocarp wall (excluding pits) with two cell layers: outermost layer with 8–10 rows of periclinally oriented cells, cells 9.2–17.2 µm in width; innermost layer with one row of periclinally oriented cells, cells 3.6–7.6 µm in width, lining the locule surface. Locule surface not lacunate.