Petiole grooved or flattened adaxially in distal portion; rachis glabrous or with a few widely scattered hairs; pinnae completely glabrous; largest ultimate segments (excluding terminal pinnae) usually less than 18 mm; spores usually 39--45 µm diam. 2 n = 58.

Sporulating summer--fall. Rocky slopes and ledges on igneous substrates; 2200--2600 m; Tex.; Mexico; Central America; South America; Pacific Islands in Hawaii.

In the flora, this subspecies is known only from the Chisos Mountains in western Texas.

Common Name: TransPecos Cliffbreak

Rarity: G5

Synonyms: None