Stipes slender, reddish brown, with scattered warts;

叶柄暗棕色，散生有疣状突起；

Small North American evergreen fern whose stipes and lower frond surfaces are densely wooly .

叶柄和复叶下侧长有浓密茸毛的小型常绿北美蕨类。

A common rock-inhabiting fern of northern temperate regions having rusty-brown stipes and lanceolate pinnate fronds.

在岩石上生长的一种具有黄褐色叶柄和披针形羽叶的北方温带蕨类。