A leaf rachis that is slender and coiling and lacks a lamina. [source: ISBN:9780881928501]
Comment
Aids plant in climbing. Differs from a leaf tendril, in that a leaf rachis tendril bear leaflets. See also leaf tendril (PO:0025361), leaflet tendril (PO:0025362), leaf apex tendril (PO:0025363), branch tendril (PO:0025364), stem apex tendril (PO:0025365), and prophyll tendril (PO:0025366). Careful observation is required to correctly classify some tendrils.