Phytocrene hirsuta Blume

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 : 63

Phytocrene hirsuta Blume

Fig. 21.17–21.24

Material examined

Specimen used for endocarp and fruit description

INDONESIA • “ Celebes ” [Sulawesi]; 1874; O. Beccari HB.2497/98; L [ L.2289338 ].

Description

FRUIT. Elliptical, with a symmetrical and elongate apex, red when mature. Epicarp with clusters of yellow-red hairs. Mesocarp thin, but thick at the accrescent part when dry. Calyx not persistent. Length 30–45 mm, width 15–20 mm, thickness 15–16 mm.

ENDOCARP. Brown, elliptical in lateral view, lenticular in transverse section, length 20–35 mm, width ca 16 mm, thickness ca 11 mm. No clear keel surrounding the endocarp in the plane of symmetry, but trace of keel present in the upper part. Apex asymmetrical, slightly emarginate in lateral view; base rounded and symmetrical. Outer surface of the endocarp pitted and ridged. Pits circular, thin, 0.4–0.8 mm in diameter, randomly arranged with ca 13–14 pits longitudinally and 8–11 pits transversally (ca 145–150 pits per face). Pits mainly narrow, occasionally capitate, without tubercles. Ridges large and flattened, diffuse, with three main ridges longitudinally (8–10 counting all longitudinal ridges); the median ridge reaching a subbasal area and spanning to the ¾ of the endocarp length; the two adjacent ridges running from the apex and interconnected together at the location of the subapical pore, and becoming diffuse and faintly apparent in the middle of the endocarp length with some transverse and longitudinal freely ending ridgelets. Endocarp wall 1035–1055 µm thick excluding pits. Detail of wall unknown. Locule surface with inflated cells. Locule with rounded protuberances due to the thickening of the wall under the pits.