Smilax ornata Lem. - syn.Smilax regelii Killip & C.V.Morton - Smilacaceae
Jamaican sarsaparilla, Honduran sarsaparilla, Jamaica-Stechwinde

Perennial woody climber, native to the Caribbean and Central America.

Smilax regelii (ornata) root extract is listed as flavor/fragrance material CAS 90131-11-6.

„Smilax ornata is used as the basis for a soft drink, frequently called Sarsaparilla. It is also a primary ingredient in old fashioned-style root beer…“ http://en.wikipedia.org/wiki/Smilax_ornata

Other commercial species providing sarsaparilla (dried roots) are Mexican Sarsaparilla (Smilax aristolochiifolia), Honduran Sarsaparilla (Smilax regelii), and Ecuadorian Sarsaparilla (Smilax febrifuga). https://www.britannica.com/topic/sarsaparilla

The roots of S.ornata contain steroidal saponins, sarsaparilloside, sarsaparilloside B, sarsaparilloside C, Δ20(22)-sarsaparilloside, and parillin.
[Steroidal saponins from the roots of Smilax sp.: Structure and bioactivity. Challinor, V. L., Parsons, P. G., Chap, S., White, E. F., Blanchfield, J. T., Lehmann, R. P., De Voss, J. J., Steroids, Vol.77(5), 2012, 504-511]