Lessoniaceae

{{Short description|Family of seaweeds}}

{{Automatic taxobox

| image = Eckloniopsis radicosa - National Museum of Nature and Science, Tokyo - DSC06917.JPG

| image_caption = Eckloniopsis radicosa

| image_alt = Eckloniopsis radicosa

| taxon = Lessoniaceae

| authority = Setchell & Gardner, 1925

| subdivision_ranks = Genera

| subdivision_ref = {{cite journal | doi=10.1111/j.1529-8817.2006.00204.x | last=Lane | first=C.E. |author2=C. Mayes |author3=L.D. Druehl |author4= G.W. Saunders | year=2006 | title=A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization | journal=Journal of Phycology | volume=42 | issue=2 | pages=493–512 }}

| subdivision =

• Ecklonia
• Eckloniopsis
• Egregia
• Eisenia
• Lessonia

}}

Lessoniaceae are a family of kelp. Species of this family have a transition zone with the intercalary meristem subdivided so that there are a number of secondary stipes in addition to the primary stipe.{{cite book| title=Phycology | url=https://archive.org/details/phycology00leer_0 | url-access=registration | isbn=978-0-521-68277-0 | first=Robert | last= Lee | year=2008 }}