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6b. Pellaea ternifolia subsp. ternifolia (Cavanilles) Link
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.
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| 1 (1) |
Rachises villous, especially in axils of pinnae; pinnae with hairs scattered along main veins abaxially. 6a. Pellaea ternifolia subsp. villosa |
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(1) |
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Rachises glabrous or with a few widely scattered hairs; pinnae completely glabrous. |
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(2) |
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| 2 (2) |
Largest ultimate segments (excluding terminal pinnae) usually less than 18 mm; distal portion of petioles grooved or flattened adaxially; spores usually 39–45 µm diam. 6b. Pellaea ternifolia subsp. ternifolia |
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(2) |
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Largest ultimate segments (excluding terminal pinnae) usually more than 18 mm; distal portion of petioles rounded or slightly flattened adaxially; spores usually 46–53 µm diam. 6c. Pellaea ternifolia subsp. arizonica |
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(1) |
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