An anatomical study of roots in species of Dyckia and Encholirium demonstrates as principal feature the presence of several layered epidermis that forms a velamen. The epivelamen has root hairs. The hypodermis has thickened walled, non living cells and some non thickened walled and living passage cells. It is one or several layred in different levels and entirely lignified. It's also observed that the other zones of the cortex are more or less thickened, depending on the level (thicker when next to the stem). The roots examined were adventiceous, with a pith, except the tap root of the young plant.
Bromeliaceae; root; anatomy; velamen
