Marojejya darianii

{{Short description|Species of palm}}

{{Speciesbox

| image = Marojejya darianii imported from iNaturalist photo 2703877 on 17 November 2023.jpg

| status = EN

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Rakotoarinivo, M. |author2=Dransfield, J. |date=2012 |title=Marojejya darianii |volume=2012 |page=e.T38605A2880647 |doi=10.2305/IUCN.UK.2012.RLTS.T38605A2880647.en |access-date=15 November 2021}}

| status2 = CITES_A2

| status2_system = CITES

| status2_ref = {{Cite web|title=Appendices {{!}} CITES|url=https://cites.org/eng/app/appendices.php|access-date=2024-01-17|website=cites.org}}

| genus = Marojejya

| species = darianii

| authority = J.Dransf. & N.W.Uhl

}}

Marojejya darianii, the big-leaf palm or Ravimbe Palm, is a species of flowering palm tree in the Palm Family (Arecaceae or Palmae). It is found only in the rainforests of Madagascar and was completely unknown to the larger world until 1984 when it was discovered by Dr. Mardy Darian. It is critically endangered, and threatened with extinction due to habitat loss. It is important because it bears the largest simple leaves (undivided, unlobed) of any known tree; up to {{convert|30|ft|m|abbr=off|sp=us|spell=in}} long by up to {{convert|4|ft|m|abbr=off|sp=us|spell=in}} wide.{{cite journal| last1= Dransfield | first1= John | last2= Uhl | first2= Natalie W.| date=October 1984 | title= A Magnificent New Palm from Madagascar | journal= Principes | volume=28 | issue= 4 | page= 151 }}