sinuately

-- Stem becoming cylindrical at an early age, and clothed with little clusters of spiny hairs; the branches are flattened out, and form broad, rather thin, blade-like growths, with the margins sinuately lobed (waved and notched).

Cactus Culture for Amateurs Being Descriptions of the Various Cactuses Grown in This Country, With Full and Practical Instructions for Their Successful Cultivation W. Watson

Fronds one to three feet high, scattered along a creeping rootstock, broadly triangular, deeply pinnatifid, with segments sinuately lobed or nearly entire.

The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton