Survey of the fruits and endocarps of Icacinaceae (Lamiids, Icacinales) Author Rio, Cédric Del Author Stull, Gregory W. Author Franceschi, Dario De text European Journal of Taxonomy 2020 2020-05-14 645 1 130 journal article 22093 10.5852/ejt.2020.645 1cd473d9-9d96-438f-bab4-29c5e56f82b8 3829651 Mappianthus iodoides Hand. -Mazz. Fig. 18.9–18.17 Material examined Specimen used for endocarp and fruit description CHINA • Kwangsi Province ; 15 Sep. 1933 ; A . N . Steward & H . C . Cheo 1093 ; P [MNHN-P-P04513538] . Other material CHINA • Kouy-Tcheou Province ; s.d.; Cavalerie 1518 ; P [ MNHN-P-P05274868 ]. Des ion FRUIT . Elliptical, asymmetrical at the apex, red-green when mature. Epicarp strigose with yellow simple hairs with granular ornamentation, faintly rugose when dry, revealing the underlying endocarp rugosities. Fig. 18. Fruits of Icacinaceae Miers. 1–8 . Mappia racemosa Jacq. ( H.A. Van Hermann 250 ). 1–5 . Endocarp. 1 . Lateral view showing rough surface. 2 . Dorsal view showing a keel surrounding the endocarp. 3 . Opposite lateral view. 4 . Apical view. 5 . Basal view. 6 . SEM image of the endocarp wall in transverse section. 7 . Detail showing anticlinally oriented outer layer cells. 8 . Detail showing periclinally oriented inner layer cells. – 9–17 . Mappianthus iodoides Hand. -Mazz. ( A.N. Steward & H.C. Cheo 1093 ). 9 . Broken dried fruit, lateral view. 10–14 . Endocarp. 10 . Lateral view showing the mounds. 11 . Dorsal view. 12 . Opposite lateral view. 13 . Apical view. 14 . Basal view. 15 . SEM image of a pericarp transverse section showing the channel with the vascular bundle. 16 . SEM image of the pericarp transverse section. 17 . SEM image of the papillae in the locule. – 18–23 . Miquelia assamica (Griff.) Mast. ex B.D.Jacks. ( Wight s.n. ). 18–19 . Endocarp. 18 . Lateral view showing the pits and ridges. 19 . Opposite lateral view. 20 . SEM image of the endocarp wall in transverse section. 21 . Detail showing the rows of cells in the endocarp wall. 22 . Other detail showing the bullate tubercle. 23 . SEM image of the inner part of the endocarp and the papillae in transverse section. Images taken from Del Rio (2018). Scale bars: 1–5, 9–14, 18–19 = 10 mm; 20 = 1 mm; 6, 15–16, 22 = 500 μm; 17, 21 = 300 μm; 7–8 = 100 μm; 23 = 50 μm. Fig. 18. (see full caption on page 52) Mesocarp 100–200 µm thick when dry. Calyx persistent. Length 20–37 mm , width 10.0–17.7, thickness 4–8 mm . ENDOCARP. Cream, elliptical in lateral view, lenticular in transverse section, length ca 25.5 mm , width ca 12.8 mm , thickness ca 6.9 mm . Channel surrounding the endocarp in the plane of symmetry. Apex asymmetrical, acute in lateral view; base rounded, symmetrical. Outer surface of the endocarp rugose with ca 73–91 mounds; mounds more or less square polygonal, each with more or less branched freely ending channel inside. Mounds organized in 5–6 longitudinal lines separated by four main longitudinal channels. The main channel on each face reaching a pore positioned subapically. Vasculature of the endocarp in the channels between mounds; primary vascular bundle half-embedded, positioned in the channel surrounding the endocarp. Endocarp wall 293–329 µm thick excluding mounds ( 484–496 µm thick including mounds). Endocarp wall with three cell layers: outermost layer with 1–4 rows of isodiametric, occasionally anticlinally oriented cells, cells 26–35 µm in length, followed by a layer with 7–10 rows of periclinally oriented cells, cells 24.6–29.0 µm in width; innermost layer with one row of periclinally oriented cells, cells 10.1–13.8 µm in width, lining the inner endocarp surface with regularly spaced and rounded papillae; papillae 21.9–30.6 µm (av. 25.6 µm ) in diameter, ca 138 papillae per 0.25 mm 2 . Locule lacunate.