Seed Morphology, Life Form and Distribution in Three Bromheadia Species (Epidendroideae, Orchidaceae)

The seed morphology of three species belonging to the genus Bromheadia was analyzed under light and scanning electron microscopy. seeds B. cecieliae truncata were studied for first time. Differences in qualitative quantitative characteristics between terrestrial finlaysoniana epiphytes observed, which concordance with life form. Due variability shapes, a new methodology is proposed analyze distance embryo testa cells, aim demonstrating presence air space within seed. method compared previous formulae used measure free space. Furthermore, measurement, angle twisted cells epiphytic orchids, proposed, evaluate degree torsion medial cells. Although wide distribution could be related great buoyancy their contrast limited cecieliae, we consider that environmental factors are more influential than when understanding these taxa. Future studies on orchid genera taxa will provide insights into this research.