Cheilanthes lindheimeri


Sp. Fil. 2: 101, plate 107a. 1852.

Common names: Fairy swords
Synonyms: Myriopteris lindheimeri (Hooker) J. Smith
Treatment appears in FNA Volume 2.

Stems long-creeping, 0.7–3 mm diam.; scales uniformly brown, ovatelanceolate, straight to slightly contorted, loosely appressed, often deciduous on older portions of stem. Leaves scattered, 7–30 cm; vernation noncircinate. Petiole usually dark-brown, rounded adaxially. Blade oblong-lanceolate to ovate-deltate, 4-pinnate at base, 2–5 cm wide; rachis rounded adaxially, with scattered linear-lanceolate scales and sparse monomorphic pubescence. Pinnae not articulate, dark color of stalk continuing into pinna base, basal pair not conspicuously larger than adjacent pair, usually equilateral, appearing densely tomentose adaxially. Costae green adaxially for most of length; abaxial scales multiseriate, lanceolate-ovate, truncate to cordate at base, usually without overlapping basal lobes, conspicuous, the largest 0.4–1 mm wide, strongly imbricate, often concealing ultimate segments, long-ciliate throughout, cilia fine, curly, forming entangled mass. Ultimate segments round to slightly oblong, beadlike, the largest 0.7–1 mm, abaxially nearly glabrous, often with a few small scales or branched hairs, adaxially appearing tomentose but actually nearly glabrous. False indusia marginal, weakly differentiated, 0.05–0.25 mm wide. Sori ± continuous around segment margins. Sporangia containing 32 spores. n = 2n = 90, apogamous.

Phenology: Sporulating summer–fall.
Habitat: Rocky slopes and ledges, on a variety of acidic to mildly basic substrates
Elevation: 200–2500 m


V2 774-distribution-map.gif

Ariz., N.Mex., Tex., Mexico


Cheilanthes lindheimeri is an apogamous triploid of unknown parentage. It is occasionally misidentified as C. wootonii (actually the element here recognized as C. yavapensis); most specimens can be placed using the characteristics given in the key. The adaxial blade surface appears to be densely gray tomentose, but this is an illusion created by the fine, curly cilia of the abaxial costal scales that overtop the minute ultimate segments and form an entangled mass that prevents the easy removal of individual costal scales.

Selected References


Lower Taxa

... more about "Cheilanthes lindheimeri"
truncate +  and cordate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Michael D. Windham +  and Eric W. Rabe +
Hooker +
not conspicuously larger than adjacent pair +
cuneate +, truncate +  and rounded +
scaly rarely glabrous adaxially pubescent +  and glabrous +
oblong-lanceolate +  and ovate-deltate +
2cm;5cm +
Fairy swords +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
200–2500 m +
0.005 cm0.05 mm <br />5.0e-5 m <br /> (0.025 cm0.25 mm <br />2.5e-4 m <br />) +
yellow +  and white +
obcordate;reniform +
Rocky slopes and ledges, on a variety of acidic to mildly basic substrates +
monomorphic +
recurved +  and reflexed +
noncircinate +  and circinate +
7 cm70 mm <br />0.07 m <br /> (30 cm300 mm <br />0.3 m <br />) +
denticulate +  and entire +
glabrous +, scaly +  and pubescent +
Sporulating summer–fall. +
not articulate +
monomorphic +
straight +
deciduous +
linear-lanceolate +  and ovatelanceolate +
yellowish +, brown +  and black or gray +
cristate +  and tetrahedral-globose +
dark colored +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
ascending +  and horizontal +
Myriopteris lindheimeri +
Cheilanthes lindheimeri +
Cheilanthes +
species +
glabrous;tomentose;glabrous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0 cm0 mm <br />0 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
crescent--shaped +  and roundish +
branched +  and anastomosing +