Stem margins are shallowly through deeply crenate and undulate. They tend to be alternate, simple, and deeply cut with crenate or jagged edges. The leaves are triangular to oblong with fine teeth along the crenate edges. The basal leaves are simple and may be crenate or entire. The leaves are in opposite pairs, triangular and crenate, sessile or with short petioles. The margins are coarsely crenate to dentate-crenate except in the base. For example, the marginal florets are funnel-shaped with crenate margins. Triacetate fibres have a crenate cross section. The blades entire or more frequently dentate or crenate, pinnately or palmately veined. The leaves are dry-season deciduous, alternate, simple, entire or crenate, oblong, long and broad. The dark green leaves are bitter-aromatic, with crenate margins. The ends of the lobes may be simple or incised to crenate. The leaf blade margins are entire or crenate. Their margins may be entire, deeply lobed, cleft, crenate or dentate and petiolate with stipules. Distal margins of the labial palps are weakly crenate.