The little knowledge on the biology of the species Tecoma stans (L.) Kunth (Bignoniaceae), known by its yellow trumpet flower and the importance that the same is acquiring mainly because of its aggressive characteristic have motivated the present work. Anatomical aspects of the fruit and seed can be used in taxonomy, as well as in studies related to the ecology of the species. The objective was to describe and to illustrate the morphology and anatomy of the fruit and seeds of the trumpet flower. Fruits from different plants were collected in the municipal districts of Jacarezinho and Maringá, North of the State of Paraná. Permanent and semipermanent slides were made. The morphological and anatomical analyses allowed the following observations: dry fruit, dehiscent, of the loculicidal capsule type; 2-carpel and 2-locular ovary with a longitudinal medium septa and anatropous and unitegmy ovules; line of dehiscence present since the beginning of the fruit development, when the continuous layer of fibers is interrupted by a strip of parenchyma cells; winged seed, not albuminous, with coriaceous wrapper that covers the embryo. This is straight, with short hypocotyl-radicular axis and no evident plumule. The wing of the seed is membranous and hyaline.
weed plant; Stenolobium stans (L.) Seem
