Stenachaenium megapotamicum(Spreng.) Baker is a native species with ornamental potential for use in landscaping and floral arrangements. This study aimed to evaluate germination and storage of S. megapotamicumseeds. In addition, the seeds were characterized morphologically. Germination was tested under constant (10, 15, 20 and 25 °C) and alternating (15-20 °C) temperatures. The seeds were stored inside two types of packages (kraft paper and polyethylene bags) under 5 and 18 °C for six months. Water content, germination speed index, and thousand seed weight were measured. The fruits are botanically named cypselae; seed coat and fruit wall are juxtaposed and inseparable; the exalbuminous seeds are 4.8 mm long, 1.7 mm wide and 0.4 mm thick, on average. Germination
temperature at 20 °C under constant light was considered optimal. Cypselae can be stored for six months in kraft paper or polyethylene bags at 5 or 18 °C, resulting in above 80% germination.