Xatardia

No map specified
Authors: Meisn. & Zeyh.
Protologue: Meisn., Pl. Vasc. Gen., 1838: 145
Synonyms: Petitia J.Gay, nom. illeg., non Jacq.
Type species: Xatardia scabra
Type species authors: (Lepeyr.) Meisn.
Type species synonyms: Selinum scabrum Lepeyr.
Number of species: 1
Distribution: Europe (W, SW: the Pyrenees)
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps; ovate or elliptic; with carpophore bifid to the base; beak absent; mericarps homomorphic; glabrous; 7.1-8.0 mm long; 3.7-4.2 mm broad; slightly compressed dorsally; with primary ribs; dorsal ribs keeled or dorsal ribs thickened; marginal ribs keeled or marginal ribs narrow-winged or marginal ribs thickened; mericarp ribs straight; with entire margin; calyx teeth obsolete; stylopodia low conical; styles long; recurved; cell borders distinct; cells isodiametric; anticlinal walls convex or anticlinal walls as narrow grooves above the middle lamella; outer cell walls flat or outer cell walls concave; cuticle striate with straight striae; exocarp cells small; commissure narrow, exocarp almost reaches carpophore; inner fibrous mesocarp obsolete; most of mesocarp composed of cells with lignified pitted walls; vascular bundles compact; situated medially in primary ribs; vittae vallecular and commissural; solitary in furrows; two on commissural side; rib sectetory ducts small, present in all ribs; endocarp not lignified; crystals obsolete; endosperm flat, slightly convex or slightly concave on commissural side; embryo with two cotyledons.

Note: rib vascular bundle clealy distinguishe at two isolated parts СЭМ: Границы клеток различимы, клетки изодиаметрические, либо антиклинальные стенки выпуклые, наружные вогнутые, либо антиклинальные стенки в виде узкого желобка, а наружные стенки плоские или с неглубокой ямкой. Кутикула струйчатая.