Hosiea japonica Makino, 1929

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 : 24

Hosiea japonica Makino

Fig. 9.19–9.25

Material examined

Specimen used for endocarp and fruit description

JAPAN • Okudai 60474; UC.

Description

FRUIT. Mesocarp ca 200 µm thick when dry.

ENDOCARP. Length ca 12.5 mm, width ca 8.1 mm, thickness ca 1.5 mm. Outer surface of the endocarp ridged with 2–3 main longitudinal ridges; the median ridge reaching the point of the base. Ridges thin and sharp, delimiting a reticulate pattern enclosing 15–18 irregular areoles generally with freely ending ridgelet inside. Vasculature of the endocarp resting on the ridges. Endocarp wall 180–235 µm thick excluding ridges (262–302 µm including ridges). Endocarp wall with three layers: outermost layer with 11–12 rows of anticlinally oriented cells, cells 14–26 µm in length; middle layer with 3–4 rows of periclinally oriented cells, cells 11–22 µm in width; innermost layer with periclinally oriented cells, cells 6 µm in width, lining the locule with regularly spaced and elongate to rounded papillae; papillae 12.2–21.0 µm (av. 14.6 µm) in diameter. Locule surface lacunate.