Cheilanthes lendigera

(Cavanilles) Swartz

Syn. Fil. 328. 1806.

Common names: Beaded lip fern
Illustrated
Basionyms: Pteris lendigera Cavanilles Descr. Pl., 268. 1802
Synonyms: Myriopteris lendigera (Cavanilles) J. Smith
Treatment appears in FNA Volume 2.

Stems long-creeping, 1–3 mm diam.; scales uniformly brown or with poorly defined, dark, central stripe, linear-lanceolate, straight to slightly contorted, loosely appressed, usually persistent. Leaves scattered to clustered, 5–30 cm; vernation noncircinate. Petiole usually dark-brown, rounded adaxially. Blade ovate-deltate to oblong-lanceolate, usually 4-pinnate at base, 1.5–8 cm wide; rachis rounded adaxially, with scattered linear scales and dense monomorphic pubescence. Pinnae not articulate, dark color of stalk continuing into pinna base, basal pair not conspicuously larger than adjacent pair, usually equilateral, appearing glabrous or sparsely pubescent adaxially. Costae green adaxially for most of length; abaxial scales uniseriate and hairlike. Ultimate segments round to slightly oblong, beadlike, the largest 1–3 mm, abaxially sparsely to moderately pubescent with coarse hairs, adaxially glabrous. False indusia inframarginal, strongly differentiated, 0.25–0.5 mm wide, forming pouch with constricted aperture on abaxial surface of ultimate segments. Sori ± continuous around segment margins. 2n = 120.


Phenology: Sporulating summer–fall.
Habitat: Rocky slopes and ledges, usually on igneous substrates
Elevation: 1300–2400 m

Distribution

V2 674-distribution-map.gif

Ariz., Tex., Mexico, Central America, South America

Discussion

Cheilanthes lendigera has the small, beadlike ultimate segments characteristic of subgenus Physapteris; the prominent inframarginal false indusia and near absence of multiseriate costal scales serve to distinguish it from all other North American members of that group. T. Reeves (1979) suggested that C. lendigera is a fertile allotetraploid resulting from hybridization between the Mexican species Cheilanthes mexicana Davenport and C. marsupianthes (Fée) T. Reeves ex Windham (unpublished).

Selected References

None.

Lower Taxa

None.

... more about "Cheilanthes lendigera"
constricted +
Michael D. Windham +  and Eric W. Rabe +
(Cavanilles) Swartz +
pubescent +  and glabrous +
not conspicuously larger than adjacent pair +
cuneate +, truncate +  and rounded +
Pteris lendigera +
scaly rarely glabrous adaxially pubescent +  and glabrous +
ovate-deltate +  and oblong-lanceolate +
1.5cm;8cm +
Beaded lip fern +
Ariz. +, Tex. +, Mexico +, Central America +  and South America +
1300–2400 m +
rarely +  and marginal +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
yellow +  and white +
obcordate;reniform +
Rocky slopes and ledges, usually on igneous substrates +
monomorphic +
scattered;clustered +
recurved +  and reflexed +
noncircinate +  and circinate +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
denticulate +  and entire +
glabrous +, scaly +  and pubescent +
Sporulating summer–fall. +
not articulate +
monomorphic +
with poorly defined , dark , central stripe;brown +
straight +
persistent +
linear-lanceolate +
Illustrated +
yellowish +, brown +  and black or gray +
1 +, 32 +  and 64 +
cristate +  and tetrahedral-globose +
dark colored +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
ascending +  and horizontal +
Myriopteris lendigera +
Cheilanthes lendigera +
Cheilanthes +
species +
glabrous;pubescent +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 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 +