骨碎补（学名：Davallia mariesii），又称为狼尾蕨、兔脚蕨，为骨碎补科骨碎补属下的一个种。原产于日本和东南亚，广泛用于园艺种植用途，亦可入药。

植株高15-20厘米。根状茎药用，功能坚骨、补肾。肉质根茎裸露在外，表面有褐色鳞片与毛茸如同兔脚，花农因此称做兔脚蕨或狼尾蕨。狼尾蕨喜温暖半阴环境，能耐一定的干燥，土壤以疏松透气的沙质壤土为主，半耐寒，冬季不能低于5℃。

Davallia mariesii (squirrel's foot fern) is a species of epiphytic fern native to Japan and eastern Asia. It is deciduous, growing to 15 cm (6 in), with rhizomes covered in brown scales and finely-dissected, flat, triangular fronds. If provided with winter protection, it is hardy down to −7 °C (19 °F). In cultivation it is used as groundcover in moist, shady areas.