Linked from
The 40 pages that link to Natural rubber, each with the reason it gives.
LatexBroader topic: It is the principal solid material obtained from Hevea rubber-tree latex.
IsopreneBroader topic: Its polymer chains are built from isoprene units.
IsoprenoidBroader topic: It is an industrial material made by polymerizing isoprene-derived units.
PolyisopreneBroader topic: It is the best-known naturally occurring form of polyisoprene.
EuphorbiaceaeBroader topic: The family's rubber tree is the principal source of natural rubber.