Apium

No map specified
Authors: L.
Protologue: Sp. Pl. ed. 1
Synonyms: Selinon Adans. , Celeri Adans., Panulia (Baill.) Koso-Pol.
Type species: Apium graveolens
Type species authors: L.
Type species synonyms: No synonyms
Number of species: 25
Distribution: Europe, Asia, Africa, Australia, Australasia, S.America, N.America, C.America, Oceania
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps; ovate or orbicular or elliptic; with entire carpophore; beak absent; mericarps homomorphic; glabrous; 1.4-1.5 mm long; 1.0-1.1 mm broad; terete; with primary ribs; all primary ribs equal, keeled; mericarp ribs straight; with entire margin; calyx teeth obsolete; stylopodia low conical; styles short; spreading; cell borders distinct; cells isodiametric; anticlinal walls concave; outer cell walls convex; cuticle 3D striato-rugulate; exocarp cells small; commissure narrow, exocarp almost reaches carpophore; inner fibrous mesocarp obsolete; mesocarp parenchyma not lignified or mesocarp parenchyma partly composed of cells with lignified pitted walls; vascular bundles compact; situated medially in primary ribs; vittae vallecular and commissural; solitary in furrows or 2–5 in each furrow; two on commissural side or 4–10 on commissural side; rib sectetory ducts obsolete; endocarp not lignified; endosperm flat, slightly convex or slightly concave on commissural side; embryo with two cotyledons.

Note: СЭМ: Границы клеток различимы, клетки в продольных рядах. Антиклинальные стенки вдавленные, наружные периклинальные выпуклые, кутикула в центе клетки объемная струйчато-морщинистая, на поперечных границах струйчатая, на продольных не видна (центральное поле). Вдоль гребня ребра кутикула струйчатая, границы клеток неразличимы, поверхность волнистая.