Cheilanthes arizonica

(Maxon) Mickel

Phytologia 41: 433. 1979

Common names: Arizona lip fern
Basionyms: Cheilanthes pyramidalis subsp. arizonica Maxon Amer. Fern J. 8: 116. 1918
Synonyms: Cheilanthes pyramidalis var. arizonica (Maxon) Broun
Treatment appears in FNA Volume 2.
Stems short-creeping, usually 4–8 mm diam.; scales uniformly dark brown or with poorly defined, dark, central stripe, narrowly lanceolate, straight to slightly contorted, loosely appressed, usually persistent. Leaves clustered, 8–25 cm; vernation circinate. Petiole dark brown, grooved most of length adaxially. Blade elongate-pentagonal, 3-pinnate-pinnatifid to 4-pinnate at base, 4–10 cm wide; rachis grooved adaxially, lacking scales, with minute, widely scattered hairs. Pinnae not articulate, dark color of stalk continuing into pinna base, basal pair conspicuously larger than adjacent pair, inequilateral, proximal basiscopic pinnules enlarged, glabrous adaxially. Costae green adaxially for most of length; abaxial scales absent. Ultimate segments elliptic to linear-oblong, not beadlike, the largest 4–10 mm, abaxially with reddish, scattered, sessile glands, adaxially glabrous; false indusia marginal to obscurely inframarginal, strongly differentiated, 0.25–0.50 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 quartzite or igneous substrates
Elevation: 1900–2400 m


V2 670-distribution-map.gif

Ariz., Mexico, Central America in Guatemala, Honduras.


The distinctive Cheilanthes arizonica is an apogamous triploid of unknown parentage. In the flora, it is known from about seven localities, all of which are situated within 50 km of the Mexican border.

Selected References


Lower Taxa


Facts about "Cheilanthes arizonica"
AuthorMichael D. Windham + and Eric W. Rabe +
Authority(Maxon) Mickel +
BasionymsCheilanthes pyramidalis subsp. arizonica +
Common nameArizona lip fern +
DistributionAriz. +, Mexico +, Central America in Guatemala + and Honduras. +
Elevation1900–2400 m +
HabitatRocky slopes and ledges, on quartzite or igneous substrates +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologySporulating summer–fall. +
Publication titlePhytologia +
Publication year1979 +
ReferenceNone +
Source xml grained fna xml/V2/V2 670.xml +
SynonymsCheilanthes pyramidalis var. arizonica +
Taxon familyPteridaceae +
Taxon nameCheilanthes arizonica +
Taxon parentCheilanthes +
Taxon rankspecies +
VolumeVolume 2 +