Cycas multipinnata

{{Short description|Species of cycad}}

{{Speciesbox

| image = Cycas multipinnata furnas 2015 (02).jpg

| image_caption =

| status = CR

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Nguyen, H.T. |date=2010 |title=Cycas multipinnata |volume=2010 |page=e.T42048A10637701 |doi=10.2305/IUCN.UK.2010-3.RLTS.T42048A10637701.en |access-date=20 November 2021}}

| genus = Cycas

| species = multipinnata

| authority = C.J.Chen & S.Y.Yang

| synonyms =

}}

Cycas multipinnata (or Epicycas multipinnata), common name Royal Sago, is a species of cycad of the Sago Palm Family (Cycadaceae) in southwestern China and northern Vietnam. It is noteworthy for four things: First it is one of the tuberous species which some taxonomists segregate as the genus Epicycas. Secondly, it has the longest leaf stalks (petioles) of any Gymnosperm; up to {{convert|11.5|ft|m|abbr=off|sp=us}}. Cultivated plants have had petioles as long as thirteen feet (four meters).Botanical Review Volume 7 issue 2 (April–June 2004) p. 164https://www.plantapalm.com/vce/taxonomy/cycadaceae7.htm The total length of the bipinnate frond can be up to 23 feet (seven meters). Uniquely, the ultimate pinnules are Y-shaped. Finally, this very conspicuous plant somehow escaped notice until 1994. Among Gymnosperms, these fronds are exceeded in mass only by Encephalartos laurentianus, and the blade (lamina) of C. multipinnata is by far the largest.