Overview

Distribution

Alta., B.C.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.
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Physical Description

Morphology

Description

Stems short-creeping, 4--8 mm diam.; scales uniformly brown or with poorly defined, dark, central stripe, linear-lanceolate, straight to slightly contorted, loosely appressed, persistent. Leaves clustered, 5--25 cm; vernation noncircinate. Petiole dark brown, rounded adaxially. Blade linear-oblong, 2--3-pinnate at base, 1--2.5 cm wide; rachis rounded adaxially, with scattered linear scales, not pubescent. Pinnae not articulate, dark color of stalk continuing into pinna base, basal pair not conspicuously larger than adjacent pair, usually equilateral, appearing sparsely pubescent or glabrous adaxially. Costae green adaxially for most of length; abaxial scales multiseriate, linear, truncate at base, inconspicuous, the largest 0.1--0.4 mm wide, loosely imbricate, not concealing ultimate segments, long-ciliate, cilia usually confined to base. Ultimate segments oblong or rarely oval, beadlike, the largest 1.5--3 mm, abaxially densely covered with branched hairs and small, ciliate scales, adaxially with scattered, branched hairs or glabrescent. False indusia marginal, slightly differentiated, 0.05--0.25 mm wide. Sori ± continuous around segment margins. Sporangia containing 64 spores.
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Diagnostic Description

Synonym

Myriopteris gracillima (D. C. Eaton) J. Smith
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Type Information

Type collection for Cheilanthes gracillima D.C. Eaton in Emory
Catalog Number: US 62540
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Verified from the card file of type specimens
Preparation: Pressed specimen
Collector(s): J. M. Bigelow
Year Collected: 1853
Locality: California, United States, North America
  • Type collection: Eaton, D. C. 1859. Rep. U.S. Mex. Bound. Surv. 2: 234.
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Ecology

Habitat

Sporulating summer--fall. Cliffs and rocky slopes, usually on igneous substrates; 800--3000m.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Cheilanthes gracillima

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N3 - Vulnerable

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Wikipedia

Cheilanthes gracillima

Cheilanthes gracillima is a species of lip fern known by the common name lace lip fern. It is native to western North America, where it grows in rocky habitat from British Columbia to California to Montana. It grows clusters of frilly green leaves up to about 25 centimeters long. Each is intricately divided into segments made up of pairs of smaller segments which are oval in shape and concave and beadlike with their edges rolled under. They are also often quite hairy. The sori are located within the rolled-under margins of each tiny leaf segment.

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Notes

Comments

Cheilanthes gracillima is a well-marked species, but it apparently hybridizes with C . intertexta (see reticulogram) to produce plants of intermediate morphology with malformed spores that have been called C . gracillima var. aberrans M. E. Jones (A. R. Smith 1974).
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