Trinia

No map specified
Authors: Hoffm.
Protologue: Gen. Pl. Umbell. ed.1: 92
Comments: nom. cons.
Synonyms: Apinella Carual ex Parl., Grammopetalum C.A.Mey. ex Meinsh., Triniella Calest.
Type species: Trinia glaberrima
Type species authors: Hoffm.
Type species note: nom. illeg., typ. cons.
Type species synonyms: Trinia pumila (L.) Rchb.
Number of species: 8-10
Distribution: Europe (W, Central, SW, S, SE, E), Asia (N, Middle, the Caucasus, SW)
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 or scabrous; 2.0-3.4 mm long; 1.3-2.0 mm broad; terete; with primary ribs; all primary ribs equal, keeled or all primary ribs equal, thickened; mericarp ribs straight; with entire margin; calyx teeth obsolete; stylopodia low conical; styles short or styles medium; recurved; cell borders distinct; cells isodiametric; anticlinal walls convex; outer cell walls concave; cuticle striate with straight striae or cuticle 3D striato-rugulate; cuticle on hairs 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 in primary rib bases or 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 large, present in all ribs; endocarp not lignified; endosperm flat, slightly convex or slightly concave on commissural side; embryo with two cotyledons.

Note: СЭМ: Границы клеток различимы, изодиаметрические, антиклинальные стенки выпуклые, наружные периклинальные вогнутые, кутикула струйчатая, изредка объемная сетчато-морщинистая. Редкие волоски 50-100 мкм, слегка сплюснутые толстостенные, с острой или закругленной верхушкой, морщинистой кутикулой.