Pyrenacantha vogeliana Baill., 1873

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 : 96

Pyrenacantha vogeliana Baill.

Fig. 31.1–31.9

Material examined

Specimen used for endocarp and fruit description

AFRICA • “ Côte orientale d’Afrique ”; s.d.; R.P. Sacleux 1873; P [ MNHN-P-P04472242 ].

Other material

GABON • 1900; R.P. Klaine 1803; P [ MNHN-P-P04472246 ].

Description

FRUIT. Elliptical, accrescent at the apex, red when mature. Epicarp strigose, with yellow simple hairs with granular ornamentation. Mesocarp 141–170 µm thick when dry. Calyx persistent. Length ca 17.4 mm, width ca 9.2 mm, thickness ca 7.2 mm.

ENDOCARP. Cream, elliptical in lateral view, lenticular in transverse section, length ca 14.6 mm, width ca 8.3 mm, thickness ca 6.6 mm. Keel surrounding the endocarp in the plane of symmetry. Apex with acute protuberance, asymmetrical in lateral view; base rounded, symmetrical. Outer surface of the endocarp pitted and ridged. Pits exclusively circular, 0.1–0.2 mm in diameter, more or less longitudinally arranged with 12–18 pits longitudinally and 13–14 pits transversally (ca 200–210 pits per face). Pits associated with peg-shaped tubercles protruding into the locule; tubercles ca 852–1057 µm in length and 273– 286 µm in diameter at the base. Endocarp wall 300–477 µm thick (excluding pits). Endocarp wall (excluding pits) with two cell layers: outermost layer with ca 19 rows of periclinally oriented cells, cells 9.0– 59.7 µm in width; innermost layer with one row of periclinally oriented cells, cells 5.7–8.5 µm in width, lining the locule surface with regularly spaced and rounded papillae; papillae 10.0– 19.4 µm (av. 15 µm) in diameter. Locule surface not lacunate.