Pyrenacantha rakotozafyi Labat, El-Achkar & R.Rabev., 1764

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 : 88-90

Pyrenacantha rakotozafyi Labat, El-Achkar & R.Rabev.

Fig. 29.1–29.9

Material examined

Specimen used for endocarp and fruit description

COMOROS • Mayotte; 2007; F. Barthelat 1764; P [ MNHN-P-P00631418 ] .

Description

FRUIT. Elliptical, slightly accrescent at the apex. Epicarp strigose, with yellow uncinate hairs, ridged when dry, more or less revealing the underlying reticulum of endocarp ridges. Mesocarp 70–200 µm when dry. Calyx persistent. Length 16.0– 18.2 mm, width 9.0– 10.8 mm, thickness 5–7 mm.

ENDOCARP. Cream, elliptical in lateral view, lenticular in transverse section, length ca 15.4 mm, width ca 10 mm, thickness ca 6.6 mm. Keel surrounding the endocarp in the plane of symmetry. Apex roundedflattened, asymmetrical in lateral view; base rounded, symmetrical. Outer surface of the endocarp pitted and ridged. Pits primarily elongate, 0.2–0.4 in length, arranged in longitudinal lines with 12–14 pits longitudinally and 8–9 pits transversally (ca 100–110 pits per face). Pits associated with peg-shaped tubercles protruding into the locule; tubercles 828–905 µm in length and 311–327 µm in diameter at the base, with ca 16 cells in width. Tubercle cells sclerotic, digitate and elongate. Ridges rounded and thin, more or less diffuse, faintly apparent. Endocarp wall 288–304 µm thick (excluding pits). Endocarp wall (excluding pits) with two cell layers: outermost layer with ca 12 rows of periclinally oriented cells, cells 14.7–32.3 µm in width; innermost layer with one row of periclinally oriented cells, cells 4.1–10.0 µm in width, lining the locule surface with inflated cells or regularly spaced and large papillate cells (generally at the apex of the tubercle), cells 12.5–20.0 µm in diameter. Locule not lacunate.