Seed biomass production and germination rates of Cyperus entrerianus1

Abstract

Abstract Cyperus entrerianus (Boeckler) (deeprooted sedge, deeproot sedge, woodrush flatsedge) has become naturalized throughout the Texas coastal prairie ecoregion and is now found throughout much of the southeastern United States. Originally from Argentina, its successful naturalization is linked to its rapid growth, morphological plasticity, and generalized habitat requirements, but little work has focused upon its seed biology or ecology. Research was conducted to quantify phytomorphological variability, develop seed yield prediction models, and quantify germination requirements for C. entrerianus to aid in future control and management efforts of this exotic invasive sedge, particularly those focused upon seedbanks. Cyperus entrerianus phytomorphology, seed production, and seed germination were extremely variable among study areas, and provide evidence for its successful naturalization. Although plants varied morphologically, spike cluster area and inflorescence diameter explained much of the variati...