sinuate

Valve linear or oblong, sometimes with sinuate sides, and with a pseudoraphe and transverse punctate lines.

Valve very convex, with sinuate keel and junction lines evident.

Valve linear with broad ventral side and straight or sinuate ventral margin.

Leaves, especially on young trees, often less deeply pinnatifid, sometimes barely sinuate.

Leaves sessile, sinuate-lobed, and with prickly teeth, often blotched with white.