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 Desmostachys planchonianus Miers Fig. 8.17–8.25 Material examined Specimen used for endocarp and fruit description MADAGASCAR • 1993; B. Lewis & S. Razafimandimbison 735 ; P[ MNHN-P-P04561640 ]. Other material MADAGASCAR • 2003; R. Rabevohitra et al. 4810 ; P[ MNHN-P-P04561628 ] • 2003; R. Rabevohitra et al. 4658 ; P[ MNHN-P-P04561629 ] • 2002; J. Rabenantoandro et al. 1155 ; P[ MNHN-P-P04561630 ]. Description FRUIT. Elliptical, asymmetrical at the apex, laterally compressed, red when mature. Epicarp strigose with yellow simple hairs with granular ornamentation, rugose when dry, revealing the underlying rugosities of the endocarp. Mesocarp 250–300 µm thick when dry. Length 10–16 mm , width 7–12 mm , thickness 5.0– 5.8 mm . Calyx persistent. Fig. 8. Fruits of Icacinaceae Miers. 1–9 . Cassinopsis madagascariensis Baill. ( P.P. Lowry et al. 5162 ). 1 . Broken fruit, lateral view. 2–6 . Broken endocarp. 2 . Lateral view showing a reticulate pattern of ridges. 3 . Dorsal view showing a keel surrounding the endocarp. 4 . Opposite lateral view. 5 . Apical view. 6 . Basal view. 7 . SEM image of the pericarp in transverse section. 8 . Detail of the same section showing the cells. 9. SEM image of the inner endocarp surface showing cluster of hairs inside. – 10– 16 . Vadensea oblongifolia (Engl.) Jongkind & O.Lachenaud ( R. Letouzey 8309 ). 10 . Dried fruit, lateral view. 11–15 . Broken endocarp. 11 . Lateral view showing a reticulate pattern of ridges. 12 . Dorsal view showing a keel surrounding the endocarp. 13 . Opposite lateral view. 14 . Apical view. 15 . Basal view. 16 . SEM image of the pericarp in transverse section. – 17–25 . Desmostachys planchonianus Miers ( B. Lewis & S. Razafimandimbison 735 ). 17 . Dried fruit, lateral view. 18–22 .Endocarp. 18 . Lateral view showing the roughness. 19 . Dorsal view showing a keel surrounding the endocarp. 20 . Opposite lateral view. 21 . Apical view. 22 . Basal view. 23 . SEM image of the endocarp in transverse section. 24 . Detail of the basal part of 23. showing periclinally oriented cells. 25 . Detail of the upper part of 23. showing anticlinally oriented cells. Images taken from Del Rio (2018). Scale bars: 1–6, 10–15, 17–22 = 5 mm; 7 = 1 mm; 16 = 500 μm; 23 = 300 μm; 9 = 200 μm; 25 = 100 μm; 8, 24 = 50 μm. Fig. 8. (see full caption on page 18) ENDOCARP. Cream, elliptical in lateral view, lenticular in transverse section, length ca 11.1 mm , width ca 7.8 mm , thickness ca 3.5 mm . Apex with an asymmetrical bulge; base rounded, slightly asymmetrical. Outer surface of the endocarp rugose, irregular, with 20–25 mounds arranged longitudinally and interspaced by 4–5 channels. Channel surrounding the endocarp in the plane of symmetry. Vasculature of endocarp lies in the channels between mounds. Endocarp primary vascular bundle positioned outside the endocarp wall. Endocarp wall 245–290 µm thick excluding mounds ( 338–474 µm thick including mounds). Endocarp wall with two layers: outermost layer with 7–10 rows of anticlinally oriented cells, cells 16–21 µm in length; innermost layer with 7–10 rows of periclinally oriented cells, cells 20–27 µm in width. Locule surface smooth.