Phytocrene oblonga Wall.

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 : 66

Phytocrene oblonga Wall.

Fig. 22.10–22.18

Material examined

Specimen used for endocarp and fruit description COUNTRY UNKNOWN • s. loc.; s.d.; s. col. s.n.; P .

Other material

VIETNAM • “Indochine”, Annam ; 4 Jun. 1920; A. Chevalier 1499; P [MNHN-P-P04513413] .

Description

FRUIT. Obovoid, symmetrical and elongated at the apex, red when mature. Epicarp with yellow long and thin hairs. Mesocarp thin but thicker in the accrescent part when dry. Calyx not persistent. Length 30–44 mm, width 15.0–25.0 mm, thickness 9–10 mm.

ENDOCARP. Brown, elliptical to oblong in lateral view, lenticular in transverse section, length ca 26.5 mm, width ca 12.3 mm, thickness ca 7 mm. No clear keel surrounding the endocarp in the plane of symmetry. Apex asymmetrical in lateral view; base rounded, slightly symmetrical. Outer surface of the endocarp pitted. Pits elongate longitudinally (concave area), ca 1.4–2.8 mm in length, representing most of the surface of the endocarp, organized longitudinally with ca 12 pits longitudinally and 7–12 pits transversally (ca 81–105 pits per face). Pits without tubercles. Endocarp wall ca 542–591 µm thick excluding pits (ca 200 µm thick including pits). Endocarp wall (excluding pits) with three cell layers: outermost layer with ca 17 rows of anticlinally oriented cells, cells 10.3–19.3 µm in length, followed by a layer with ca 4 rows of periclinally oriented cells, cells 13.9–18.6 µm in width; innermost layer with one row of periclinally oriented cells, cells 17.0– 29.8 µm in width, lining the locule surface with the inflated cells. Locule with rounded protuberances due to the thickening of the wall under the pits.