Acronema

No map specified
Authors: Falc. ex Edgew.
Protologue: No protologue
Synonyms: No synonyms
Type species: Acronema tenerum
Type species authors: (DC.) Falc. ex Edgew.
Type species synonyms: Helosciadium tenerum DC.
Number of species: 30
Distribution: Asia (E: China, Himalaya)
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps or fruits free, not separating into mericarps; ovate or elliptic or lanceolate or linear-lanceolate; with carpophore bifid to the base or with entire carpophore; beak absent or with short beak; mericarps homomorphic; glabrous; 1.4-2.2 mm long; 0.5-1.5 mm broad; terete; with primary ribs; all primary ribs inconspicuous or all primary ribs equal, filiform; mericarp ribs straight; with entire margin; calyx teeth prominent or calyx teeth obsolete; short; linear or triangular; stylopodia flat or stylopodia low conical; styles short or styles medium; spreading or recurved; cell borders indistinct; surface longitudinally sulcate; cuticle smooth or cuticle rugulate; exocarp cells small; commissure narrow, exocarp almost reaches carpophore; inner fibrous mesocarp obsolete; mesocarp parenchyma not lignified; vascular bundles compact; 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 or endosperm with broad, shallow groove on commissural side.

Note: СЭМ: Клетки на поверхности ребер неразличимы, поверхность продольно бороздчатая, кутикула струйчатая. В ложбинках границы клеток неразличимы, поверхность бугорчато-ямчатая, кутикула гладкая или морщинистая.