Types of enrichment axes in Poaceae

TIVANO, JUAN CARLOS.; MARIEL PERRETA AND ABELARDO CARLOS VEGETTI

FLORA

Edit. Gustav Fischer

Lugar: Jena; Año: 2008 vol. 204 p. 1 - 5

0367-2530

The objective of this review work is to characterize the enrichment axes in Poaceae, especially integrating into that analysis those species with basal or subterranean cleistogamous spikelets. We recognize five types of enrichment axes:  paraclades of the unit of inflorescence (UIF), paraclades of the trophotagma with exposed UIF; paraclades of the trophotagma with not exposed UIF; paraclades  subterranean on short rhizomes and paraclades subterranean  upon plagiotropic axes of long internodes. According to the enrichment axes we differentiate six types of synflorescences. The different types of enrichment axes and synflorescences types are characterized, determining in some cases the existence of fruit heteromorphism.