Plectocephalus formosus
Plectocephalus formosus is a thistle erected by Ravenna as a Centaurea (i.e. C formosa Ravenna)
Taxonomy change
P formosus (Ravenna) Penneck. and Gl.Rojas
Wikispecies has information on: Plectocephalus formosus.
Media related to Plectocephalus at Wikimedia Commons