No map specified
Authors: Miq.
Protologue: Ann. Mus. Bot. Lugd.-Batav. 3: 58
Synonyms: Macrochlaena Hand.-Mazz.
Type species: Nothosmyrnium japonicum
Type species authors: Miq.
Type species synonyms: No synonyms
Number of species: 2
Distribution: Asia (E)
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps; didymous; with carpophore bifid to the base; beak absent; mericarps homomorphic; glabrous; 1.5-3.0 mm long; 0.4-0.7 mm broad; terete; with primary ribs; all primary ribs inconspicuous or all primary ribs equal, filiform; mericarp ribs straight; with entire margin; calyx teeth obsolete; stylopodia conical; styles medium; recurved; cell borders distinct; cells isodiametric; anticlinal walls concave; outer cell walls dome-shaped; 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; 2–5 in each furrow; 4–10 on commissural side; rib sectetory ducts obsolete; endocarp not lignified; crystals obsolete; endosperm flat, slightly convex or slightly concave on commissural side; embryo with two cotyledons.

Note: СЭМ: Границы клеток различимы, клетки изодиаметрические, антиклинальные стенки вдавленные, наружные периклинальные куполообразные с вдавленной верхушкой, или с 2-3-лучевыми гребешками. Кутикула морщинистая, над антиклинальными стенками заметна скульптура. Устьице не влияет на скульптуру кутикулы.