Miquelia assamica (Griff.) Mast. ex B.D.Jacks.

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 : 54-55

Miquelia assamica (Griff.) Mast. ex B.D.Jacks.

Fig. 18.18–18.23

Material examined

Specimen used for endocarp and fruit description

INDIA • 1871; Wight s.n.; K[sheet lacking barcode, same specimen series as K 000700042 ]

Other material

INDONESIA • “ Celebes ” [Sulawesi]; P [MNHN-P-P04513530] .

Description

FRUIT. Elliptical, asymmetrical and acuminate at the apex. Epicarp glabrous, shrunken when dry, revealing the underlying reticulum of endocarp ridges. Length 9.0– 13.5 mm, width 8.0– 9.3 mm, thickness ca 5 mm.

ENDOCARP. Elliptical in lateral view, length ca 13.5 mm, width ca 8.9 mm. Keel surrounding the endocarp in the plane of symmetry. Apex slightly asymmetrical, acute in lateral view, with apical hole in apical view. Outer surface of the endocarp pitted, ridged and rugose. Ridges large and rounded, faintly apparent, with three main longitudinal ridges delimiting a reticulate pattern enclosing a few polygonal areoles. Rugosities apparent on the ridges, mostly on the keeled margin and transversally oriented ridges. Pits large, 1–2 mm in diameter, exclusively circular, organized in longitudinal lines, 3–4 pits longitudinally and transversally (ca 12 pits per face). Pits associated with bullate tubercles, ca 240 µm in length inside the endocarp. Endocarp wall ca 182–210 µm thick (with and without ridges; the ridges are mainly formed by a fold of the wall rather than extra thickening). Endocarp wall with two cell layers: outermost layer with ca 12 rows of periclinally oriented cells, cells 13.4–28.0 µm in width; innermost layer with one row of periclinally oriented cells, cells 8.2–11.0 µm in width, covering the inner endocarp surface with regularly spaced and rounded papillae; papillae 13–18 µm (av. 16 µm) in diameter. Locule lacunate.