'Myrtifolia' was described as having leaves ovate or rhombic-ovate to oblong-ovate, 2–5 cm long with nearly simple teeth, loosely pilose on both sides.
The 'Myrtifolia' plant is distinguished by its leaf shape, which can be oval or have a more angular shape, measuring between 2 and 5 centimeters in length, featuring almost hair-like teeth, and having soft hairs covering both sides of the leaves.