The objective of this investigation was to evaluate the number, size, viability, and germination of the seeds orchid Prosthechea sp., as well as morphologic characteristics of the fruit. The fruits were obtained in La Aguadita (Fusagasuga - Cundinamarca, Colombia). Fruit variables evaluated were: height, width, length and weight and for the seed: number, weight, size, germination and viability. The viability test was performed with Tetrazolium using four concentrations (0.4; 0.6; 0.8 and 1.0 %), 3 immersion times (30, 60 and 120 minutes in Tetrazoliun solution) and 6 repetitions. Prosthechea fruit measured: height (2.9 cm), width (2.4 cm), length (4.8 cm) and ellipse shaped with weights between 2.91 and 3.24 g. The seeds measured had 0.7 mm length and 0.3 mm width. The embryo was green with dimensions of 0.3 mm length and 0.2 mm width. The weight of 15000 Prosthechea seeds was 5.55 x 10-3 g. The number of seeds per fruit was: 3334091. Average viability was 48% and there were significant differences among immersion times and concentrations. Germination was about 29%.