Biannual plant stem almost zero, seated on a tap root, which come from the leaves of elongated shape, with wide and meaty nerve and limbo divided with roughly toothed edges.
In the second year develops a highly branched stem which emits chapter of blue flowers. There are two botanical varieties, differentiated by the shape of its leaves: the variety crispa leaves with very divided limbo and very jagged edges. And the variety latifolia, with less toothed and broad, wavy leaves.
