In some species the leaves are arranged in a basal rosette. In some species this is an initial stage that is followed by the production of an upright stem (e.g. Pattersons Curse), while in others a distinct aerial stem is never produced (e.g. Flat Weed Hypochaeris sp.). In many cases radical leaves are alternate, but with very short internodal distances. Radical leaves are almost NEVER whorled (although they may superficially appear that way).