Differences from Smilacaceae include that Ripogonum lacks stipules , it has a wet rather than dry stigma , its seeds and leaves contain starch , and its guard cells contain oil .
Like most species of the closely related Smilacaceae , most species of Ripogonum are woody vines .
Differences from Smilacaceae include that Ripogonum lacks stipules , Ripogonum has a wet rather than dry stigma , Ripogonum 's seeds and leaves contain starch , and its guard cells contain oil .
Like most species of the closely related Smilacaceae , most species of Ripogonum are woody vines .