Desmostachys planchonianus Miers, 1852

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 : 18-20

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.

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.