Vadensea Jongkind & O.Lachenaud

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 : 20

Genus Vadensea Jongkind & O.Lachenaud

Figs 8.10–8.16, 9.1–9.18

Description

FRUIT. Elliptical, laterally compressed, red when mature. Epicarp strigose to puberulent with yellow simple hairs with granular ornamentation, smooth to reticulate when dry, revealing the underlying reticulum of endocarp ridges. Calyx persistent.

ENDOCARP. Cream to brown, elliptical in lateral view, lenticular to globose in transverse section. Keel often surrounding the endocarp in the plane of symmetry, occasionally not visible. Apex more or less asymmetrical in lateral view; base symmetrical. Outer surface of the endocarp ridged, with diffuse or reticulate pattern of sharp to angular ridges. When reticulate, ridges delimit polygonal areoles with or without freely ending ridgelets. Endocarp with a symmetrical pair of pores compressed on the keel, positioned eccentrically and subapically on the endocarp faces, each with a central pit, or replaced by an apical bulge. Vasculature on the endocarp surface follows the reticulum of ridges. Endocarp primary vascular bundle outside the endocarp wall or in a channel on the keel. Endocarp wall with at least one row of periclinally oriented cells. Locule surface smooth, more or less lacunate.

Taxonomic remark

This work was largely completed before the taxonomic modification of the genus Desmostachys s. l. ( Jongkind & Lachenaud 2019). For practical reasons, we decided to keep the structure of this survey, but we included the taxonomic modifications. The probable polyphyly of Desmostachys s. l. had already been outlined in the discussion, and we decided to keep these comments as a means of corroborating the study of Jongkind & Lachenaud (2019).