dextrorse

Etymology
From , contracted from , , from  + , , past participle of ,.

Adjective

 * 1) Turning from the left to the right, in the ascending line, as in the spiral inclination of the stem of the morning glory.
 * 2)  Having a negative torsion.

Usage notes

 * At present scientists predicate dextrorse or sinistrorse quality of the plant regarded objectively; formerly the plant was regarded subjectively, and what is now called dextrorse was then considered sinistrorse.