Borreria latifolia, commonly known as broadleaf button broom and Borreria verticillata as true button broom. These are invasive grasses that inhabit vacant pastures and are morphologically very similar. Because of this, this work proposes to know the anatomy of their vegetative organs, aiming at the separation of the taxa. To accomplish the objective, botanical materials were collected at the Research Campus of the Goeldi Museum. In the laboratory parts were selected to be herborized and incorporated into the Herbarium João Murça Pires and part was fixed to be treated using the usual techniques in plant anatomy. With the purpose of getting to know the vegetative organs at the anatomical level, it was verified that the underground organs in transversal view of both species in study present similar characteristics, that is, coating tissue, cortical tissue with cells containing raphides and starch grains and collateral vascular tissue. As for the stem, which is an aerial organ, in transversal cut it was seen that it presents a coating region, cortical region, vascular region and a medullary region similar organization in the species. In the leaf, it can be seen that there are common characteristics and differences between the studied taxa. Both species present paracitic stomas in the adaxial surface as well as in the abaxial, being, therefore, anfiestomatic, however they present differences that are: striated cuticle, tectors trichomes and the presence of papillae are common in Borreria latifolia A. B, absent in Borreria verticillata L.M. With the above results it was possible to differentiate the studied taxa.
|
