Stachyanthus donisii (Boutique) Boutique

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 : 108

Stachyanthus donisii (Boutique) Boutique

Fig. 34.1–34.9

Material examined

Specimen used for endocarp and fruit description

DEMOCRATIC REPUBLIC OF THE CONGO • Gimbi ; 4 Apr. 1948; J. H. Laurent 423; BR [ BR0000005850273 ] .

Description

FRUIT. Slightly asymmetrical at the apex, yellow-blue when mature. Epicarp strigose, with yellow simple hairs with granular ornamentation and yellow uncinate hairs, rugose when dry. Mesocarp ca 200 µm thick when dry. Length 17.0– 18.6 mm, width 10.0– 10.4 mm, thickness ca 7 mm.

ENDOCARP. Cream, length ca 16.9 mm, width ca 9.8 mm, thickness ca 6.3 mm. Pits circular in the center, more elongate laterally, 0.2–0.6 mm (av. 0.3 mm) in diameter, randomly arranged with 12–16 pits longitudinally and 9–11 pits transversally (ca 153–155 pits per face). Pits associated with bullate tubercles protruding into the locule; tubercles ca 364–418 µm in length and 768–819 µm in diameter at the base. Tubercle cells sclerotic, digitate and periclinal. Ridges rounded and thin, faintly apparent, with the median ridge spanning from the apex to the ¼ of the base. Reticulum forming a diffuse pattern of ridges interconnecting the median ridge with the keel, arbuscle-like shaped. Endocarp wall 110–216 µm thick excluding ridges (ca 220 µm thick including ridges). Endocarp wall with two cell layers: outermost layer with ca 10–11 rows of periclinally oriented cells, cells 8.3–26.4 µm in width; innermost layer with one row of periclinally oriented cells, cells 7.7–9.7 µm in width, lining the locule surface.