Other plants twining spirally around an axis from right to left are called sinistrorse or sinistrorsal.    From Wordnik.com.  [VERBATIM: The Language Quarterly Vol IX No 3] Reference

Though the bean always insists on a sinistrorsal growth, as B, the hop prefers to climb in a dextrorsal manner, as A.    From Wordnik.com.  [Amusements in Mathematics] Reference