Taxonomia e anatomia dos órgãos vegetativos de heliotropium polyphyllum var. blanchetti. lehn boraginaceae da restinga das ilhas de Algodoal e Maiandeua - Pará

Abstract

Among the species of the Boraginaceae family that occurs in Restinga de Algodoal - Maiandeua/Pa, Heliotropium polyphyllum var. blanchetti, commonly known by the community as sete sangrias, is used, according to the locals in the form of tea from the leaves and branches, as a blood purifier. The main objective of the present work was to contribute to the knowledge of the taxonomy and anatomy of the species. For this study we followed the usual techniques in plant anatomy and the dissection of the flower for the taxonomic part. As a result, it was observed that this species has a creeping habit, elliptic leaves, rich in sericeous indumentum on both sides. It has small flowers, gathered in scorpioid inflorescence. As for the stem and root both have secondary growth surrounded by the suber. Attached to this, there is a cortical parenchyma in which the root has a greater number of layers of parenchymatic cells, in the stem, however, this number of layers is smaller and commonly has starch grains. In the roots the xylem is well developed and its parenchymatic rays reach the cortical region, while in the stem this does not occur; in this same organ, one notices a medulla filled with parenchymatic cells interspersed with petrine cells. The information gathered here is a contribution to the taxonomic and anatomical knowledge of the species.