Hosiea sinensis (Oliv.) Hemsl. & E.H.Wilson

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 : 26

Hosiea sinensis (Oliv.) Hemsl. & E.H.Wilson

Fig. 10.1–10.9

Material examined

Specimen used for endocarp and fruit description

CHINA • “ District de Tchen-Kéou-Tin ”; s.d.; M. l’abbé Farges s.n.; P[ MNHN-P-P04513501 ].

Description

FRUIT. Epicarp glabrous, reticulate when dry, revealing the underlying reticulum of endocarp ridges. Mesocarp ca 70 µm thick when dry. Length 13–18 mm, width 8.1 mm, thickness 3.9 mm.

ENDOCARP. Length ca 12.6 mm, width ca 7.8 mm, thickness ca 1.1 mm. Outer surface of the endocarp ridged, with 3–4 main longitudinal ridges; the median ridge reaching the point of the base. Ridges thin and rounded, forming a reticulate pattern enclosing 14–20 areoles, generally with a freely ending ridgelet inside. Vasculature of the endocarp free. Endocarp wall 161–202 µm thick excluding ridges (ca 250 µm thick including ridges). Endocarp wall with three cell layers: outermost layer with 5–10 rows of anticlinally oriented cells, cells 10–13 µm in length; followed by a layer of 5–7 rows of periclinally oriented cells, cells 15–19 µm in width; innermost layer with a single row of periclinally oriented cells, cells ca 6 µm in width, lining the locule with regularly spaced and elongate papillae; papillae 11–21 µm in diameter, ca 1000 papillae per 0.25 mm 2. Locule surface lacunate.