homodromous

from The Century Dictionary.

• In mech., having, as a lever, the power and weight on the same side of the fulcrum, so that both move up or down together. See lever.
• In botany, having a similar spiral arrangement of the leaves on the stem and branches; having the spires running in the same direction: opposed to heterodromous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective botany Running in the same direction; said of stems twining round a support, or of the spiral succession of leaves on stems and their branches.
• adjective engineering Moving in the same direction; said of a lever or pulley in which the resistance and the actuating force are both on the same side of the fulcrum or axis.