Trigonosciadium

No map specified
Authors: Boiss.
Protologue: Ann. Sci. Nat. Bot. ser. 3, 1844 1: 344
Synonyms: No synonyms
Type species: Trigonosciadium tuberosum
Type species authors: Boiss.
Type species synonyms: No synonyms
Number of species: 5
Distribution: Asia (SW)
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps; ovate or orbicular or elliptic; with carpophore bifid to the base; beak absent; mericarps homomorphic; scabrous or densely hairy; 8.0-11.0 mm long; 6.5-11.0 mm broad; strongly compressed dorsally; with primary ribs; dorsal ribs inconspicuous or dorsal ribs filiform; marginal ribs winged or marginal ribs thickened in distal part; mericarp ribs straight; with entire margin; calyx teeth obsolete; stylopodia conical; styles medium or styles long; spreading; cell borders distinct or cell borders indistinct; surface irregularly rugate; cells isodiametric; anticlinal walls convex; outer cell walls flat; cuticle striate with straight striae; cuticle on hairs rugulate or cuticle on hairs tuberculate; exocarp cells small; commissure broad, exocarp interrupted near edges of marginal ribs; inner fibrous mesocarp obsolete; mesocarp parenchyma not lignified; vascular bundles compact; situated distally in primary ribs; vittae vallecular and commissural; solitary in furrows; two 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: in upper part of mericarps? under stylopodium there is an emaginature; vascular bundles in marginal ribs are situated near an extremity of ribs СЭМ: Границы клеток местами различимы – изодиаметрические с выпуклыми антиклинальными стенками и плоскими наружными периклинальными, местами границы неразличимы, поверхность беспорядочно морщинистая, кутикула струйчатая, у оснований волосков радиальная. Волоски 2 типов. 1) слегка или сильно сплюснутые толстостенные, 30-700 мкм длиной (длинные очень редко, большинство волосков до 200 мкм), остроконечные, с морщинистой и бугорчатой кутикулой. 2) тонкостенные сильно сплюснутые, 50-80 мкм длиной, конец закругленный или не такой острый, как у толстостенных волосков, кутикула – нет фото.