Definition of "rugose"

Petraea foliis rugosis ovatis. The oval, rugose-leaved Petraea. The root is brachiated; the shrub rises to ten feet high: the leaves are three inches long, an inch and a half broad, even at the edges, and very rough to the touch: (Note: In modern nomenclature, the plant in question probably is Petrea rugosa, as the spelling "Petraea" does not seem to match any extant genus,)

1751, anonymous author, A General Natural History: Or, New and Accurate Descriptions Of The Animals, Vegetables, and Minerals, Of the Different Parts of the World‎, Thomas Osborne, pages 261–

The original leaves were flat and very rugose, and almost hid by the numerous single-stemmed flowers; while the leaves produced in the umbellate state were larger, more upright, and less wrinkled.

1866, Botanical Society of Edinburgh, Transactions of the Botanical Society‎, pages 459–