''Erysimum fitzii'' is a

biennial Biennial means (an event) lasting for two years or occurring every two years. The related term biennium is used in reference to a period of two years. In particular, it can refer to: * Biennial plant, a plant which blooms in its second year and th ...

or short-lived

perennial plant A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

native to southern

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = '' Plus ultra'' ( Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , ...

. It has been treated as one of a complex of six species making up the ''nevadense'' group, or as ''Erysimum nevadense'' subsp. ''fitzii''.

Taxonomy

''Erysimum fitzii'' was one of a number of new ''

Erysimum ''Erysimum'', or wallflower, is a genus of flowering plants in the cabbage family, Brassicaceae. It includes more than 150 species, both popular garden plants and many wild forms. The genus ''Cheiranthus'' is sometimes included here in whole o ...

'' species first described by Adolf Polatschek in 1979. Six of these, including ''E. fitzii'', were considered to be closely related and were reduced to subspecies of '' E. nevadense'' in ''

Flora Europaea The ''Flora Europaea'' is a 5-volume encyclopedia of plants, published between 1964 and 1993 by Cambridge University Press. The aim was to describe all the national Floras of Europe in a single, authoritative publication to help readers identify ...

'', a decision explained by Peter William Ball in 1990. The six were treated as separate species making up the ''E. nevadense'' group or complex in ''Flora Iberica'' in 1993. A

molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

study published in 2014 included four of the species, although not ''E. fitzii''. The study did not support the view that the four were closely related, and authors concluded that the ''E. nevadense'' group did not have phylogenetic support.

References

{{taxonbar, from1=Q38544865, from2=Q43374277 fitzii Endemic flora of Spain Plants described in 1979