dextrorse vines.    From Wordnet, Princeton University. 

It's not that Turnbull is stupid-he can quote Kierkegaard and Pascal on angst and allude to the deaths of Schubert and Mozart and distinguish between a sinistrorse and a dextrorse Polygonum vine, etc.    From Wordnik.com.  [John Updike, Champion Literary Phallocrat, Drops One; Is This Finally the End for Magnificent Narcissists?] Reference