Gigasiphon macrosiphon

{{Short description|Species of legume}}

{{Speciesbox

| image = Gigasiphon macrosiphon 0zz.jpg

| status = EN

| status_system = IUCN2.3

| status_ref = {{cite iucn |author=CAMP Workshop, Kenya (November 1996) |year=1998 |title=Gigasiphon macrosiphon |volume=1998 |page=e.T30387A9533608 |doi=10.2305/IUCN.UK.1998.RLTS.T30387A9533608.en |access-date=26 April 2023}}

|genus = Gigasiphon

|species = macrosiphon

|authority = (Harms) Brenan

}}

Gigasiphon macrosiphon is a species of plant in the family Fabaceae. It is known from several localities in Kenya and Tanzania.

Only about 33 individuals were found in surveys in 2013. Population decline is believed to be mainly due to habitat loss.{{cite news|url=https://www.theeastafrican.co.ke/magazine/Endangered-giga-not-out-of-the-woods-yet/434746-1999190-d3hovd/index.html|title=Endangered giga not out of the woods yet|newspaper=The EastAfrican|author=Rupi Mangat|date=19 September 2013}} The IUCN currently classifies the species as Endangered.