spider brake

Pteris multifida, the spider brake, is a species of fern in the family Pteridaceae. It is native to central and southern China, Korea, Japan, the Ryukyus, Taiwan, and Vietnam. A shade-loving lithophyte with fronds reaching at most 60 cm (24 in), it is typically found growing on old walls, and is a rare example of a fern synanthrope. Consequently it has been introduced to many locales around the world, including many of the United States, some of the...