WAIT. i just reblogged this thinking this was the architectural outline for the building or something but then i realized in the outline there were OUTLINES OF PEOPLE meaning THIS IS A FUCKING PAINTING OR SOMETHING ARE YOU FOR REAL RIGHT NOW
Vetches and passion flowers have modified some of their leaves and converted them into tendrils. These grope around in space until they touch the stem of another plant and swiftly coil around it. The tendrils then coil and pull the plant up towards the sunlight.