Sphaenolobium

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Authors: Pimenov
Protologue: Nov. Sist. Vyssh. Rast. 12: 243
Synonyms: No synonyms
Type species: Sphaenolobium tianschanicum
Type species authors: (Korovin) Pimenov
Type species synonyms: Selinum tianschanicum Korovin
Number of species: 3
Distribution: Asia (Middle)
Bibl.: No bibliography
No illustration specified

Features: fruits separating into mericarps; lanceolate; with carpophore bifid to the base; beak absent; mericarps homomorphic; glabrous; 6.0-10.0 mm long; 1.8-3.2 mm broad; slightly compressed dorsally; with primary ribs; dorsal ribs keeled; marginal ribs keeled or marginal ribs narrow-winged; mericarp ribs straight; with entire margin; calyx teeth prominent; short; triangular; stylopodia low conical; styles medium; recurved; cell borders distinct or cell borders indistinct; surface longitudinally rugate or surface irregularly rugate; cells isodiametric or cells elongated; anticlinal walls concave; outer cell walls convex; exocarp cells small; commissure broad, exocarp interrupted near edges of marginal ribs; inner fibrous mesocarp obsolete; mesocarp parenchyma not lignified; vascular bundles compact; situated in primary rib bases; vittae vallecular and commissural; solitary in furrows; two on commissural side; rib sectetory ducts small, present in all ribs; endocarp not lignified; endosperm with broad, shallow groove on commissural side; embryo with two cotyledons.

Note: СЭМ: Границы клеток местами неразличимы, поверхность продольно или беспорядочно морщинистая. Местами слабые границы клеток, изодиаметрические и удлиненные, антиклинальные стенки вдавленные изогнутые, наружные периклинальные выпуклые. Кутикула струйчатая.