Poa Annua L. y Polypogon Elongatus Kunth (Poaceae), Dos nuevas especies exóticas para la flora de la Guayana venezolana

poa annua and polypogon elongatus (poaceae) are described as two new additions to the flora of the venezuelan guayana. these taxa are exotic to the bioregion, so they could represent a possible threat to the local biodiversity as invasive species. actions for population management are proposed.