Icacina guessfeldtii Asch., 2674

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 : 27

Icacina guessfeldtii Asch.

Fig. 10.18–10.26

Material examined

Specimen used for endocarp and fruit description

DEMOCRATIC REPUBLIC OF THE CONGO • 1902; J. Gillet 2674; BR[ BR0000015572677 ].

Other material

REPUBLIC OF THE CONGO • “ Route de Kinkala , Itineraire Mahitou - Boutsouka - Tonkama”; Jun. 1964; A. Bouquet 28; P [MNHN-P-P04495336] .

Description

FRUIT. Elliptical to obovate, red when mature. Epicarp glabrous, ridged when dry, revealing the underlying reticulum of endocarp ridges. Mesocarp 400–600 µm thick when dry. Length 21–30 mm, width 15–20 mm, thickness 12.0– 19.4 mm.

ENDOCARP. Obovate in lateral view, globose in transverse section, length ca 26.3 mm, width ca 17 mm, thickness ca 16.5 mm. Keel surrounding the endocarp wall in the plane of symmetry, with one part flattened and containing a vascular bundle embedded within the endocarp wall. Apex truncate; base acute, slightly asymmetrical. Outer surface of the endocarp ridged and rugose, with a median ridge reaching the point of the base and running nearly to the apex. Lateral ridges irregular and disconnected, running along more or less the entirety of the endocarp length. Ridges rounded with a slight median channel, forming a diffuse pattern, occasionally forming an arbuscle-like branch. A few isolated mounds cover the surface randomly. Endocarp possessing a symmetrical pair of pores compressed on the keel, positioned eccentrically and subapically on the apical endocarp faces, each with a central pit. Endocarp wall 263–306 µm thick excluding ridges (470–560 µm including ridges). Vasculature of the endocarp resting in the channels of the ridges but also free. Endocarp wall with ca 15 rows of periclinally oriented cells, cells 20–27 µm in width. Locule surface smooth, slightly lacunate.