acrogen
(ˈækrədʒən) noun any flowerless plant, such as a fern or moss, in which growth occurs from the tip of the main stem
[C19: from acro- + Greek genēs born; see -gen]
> acrogenic (ˌækrəˈdʒɛnɪk) or acrogenous (əˈkrɒdʒɪnəs) adjective
> aˈcrogenously adverb