raiz primária
thumb|The two types of root systems in plants. The fibrous-root system (A) is characterized by many roots with similar sizes. In contrast, plants that use the taproot system (B) grow a main root, with smaller roots branching off. The letters indicate where the root systems begin.
Article · Português
A raiz primária de uma planta é a raiz que cresce verticalmente para baixo. Forma um centro do qual outras raízes podem brotar.
Abstract from DBpedia / Wikipedia · CC BY-SA