Iodes seretii (De Wild.) Boutique, 1960

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 : 45

Iodes seretii (De Wild.) Boutique

Fig. 16.1–16.9

Material examined

Specimen used for endocarp and fruit description

CAMEROON • Forest near Boa Bakundu village, south west of Kumba; 19 Apr. 1986; D. Thomas & M. Etuge 63; BR [ BR0000015596772 ] .

Other material

NIGERIA • Ekwuno PFO 370; MO [ MO-2730593 ] .

Description

FRUIT. Elliptical, red when mature. Epicarp pilose, with yellow long and thin hairs and yellow simple hairs with granular ornamentation. Mesocarp 132–162 µm thick when dry. Length 11.6–15.5 mm, width 8.5–10.0 mm, thickness 5.6 mm.

ENDOCARP. Brown, elliptical in lateral view, lenticular in transverse section, length ca 11.6 mm, width ca 8.7 mm, thickness ca 5.9 mm. Keel surrounding the endocarp in the plane of symmetry, with the thicker margin containing a vascular bundle embedded within the endocarp wall. Apex slightly asymmetrical in lateral view, with a central pit in apical view; base rounded, symmetrical. Outer surface of the endocarp ridged with 3–4 main longitudinal ridges (6–7 including small longitudinal ridges); the median and two lateral ridges reaching the point of the base and running along the endocarp length. Ridges thin, rounded to rectangular, with a median channel, delimiting a reticulate pattern enclosing 23–25 polygonal and longitudinally extended areoles. Surface of endocarp finely covered by ridgelets-rugosities. Vasculature of the endocarp resting in the channels of the ridges. Endocarp wall 227–245 µm thick excluding ridges (320–386 µm including ridges). Endocarp wall with three cell layers: outermost layer with 1–3 rows of isodiametric cells (mesocarp?), cells 12.2–17.2 µm in diameter, followed by a layer with 15 rows of periclinally oriented cells, cells 9.4–13.2 µm in width; innermost layer with one row of periclinally oriented cells, cells 5.4–8.7 µm in width, covering the inner endocarp surface with regularly spaced and rounded papillae; papillae 11.8–13.7 µm (av. 12.7 µm) in diameter. Locule lacunate.