View source for Pellaea andromedifolia

{{Treatment/ID
|accepted_name=Pellaea andromedifolia
|accepted_authority=(Kaulfuss) Fée
|publications={{Treatment/Publication
|place=5: 129. 1852
|year=1852
}}
|basionyms={{Treatment/ID/Synonym
|name=Pteris andromedifolia
|authority=Kaulfuss
}}
|synonyms={{Treatment/ID/Synonym
|name=Pellaea andromedifolia var. pubescens
|authority=D. C. Eaton
}}
|hierarchy=Pteridaceae;Pellaea;Pellaea andromedifolia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pellaea]]</div><div class="higher-taxon"><small>species</small>[[Pellaea andromedifolia]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>creeping, horizontal, slender, 2–4 mm diam.; scales mostly bicolored, narrowly lanceolate, largest scales 0.3–0.8 mm wide, centers black, thick, margins brown, thin, irregularly dentate. <b>Leaves</b> monomorphic, scattered along stem, 10–60 cm; croziers not conspicuously pubescent, densely scaly. <b>Petiole</b> straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines. <b>Blade</b> elongate-deltate, usually 3-pinnate proximally, 3–20 cm wide; rachis tan throughout, straight to slightly flexuous, rounded or flattened adaxially, glabrous or pubescent. <b>Pinnae</b> ascending or perpendicular to rachis, not decurrent on rachis, with 8–50 ultimate segments; costae usually straight, 15–140 mm, longer than ultimate segments. <b>Ultimate</b> segments elliptic to ovate, 3–15 mm, somewhat herbaceous, glabrous to sparsely pubescent abaxially; margins recurved on fertile segments, usually covering less than 1/2 abaxial surface, borders whitish, entire; apex retuse to rounded. <b>Veins</b> of ultimate segments evident. <b>Sporangia</b> short-stalked, containing 64 or 32 spores, not intermixed with farina-producing glands. <b>2n</b> = 58; n = 2n = 87, 116, apogamous.</span><!--

-->{{Treatment/Body
|phenology=Sporulating late spring–summer.
|habitat=Rocky slopes and ledges, usually on igneous substrates
|elevation=0–1500 m
|distribution=Calif.;Oreg.;Mexico in Baja California.
|discussion=<p>Pellaea andromedifolia comprises three cytotypes: a sexually reproducing diploid, an apogamous triploid, and an apogamous tetraploid. Isozyme studies by G. J. Gastony and L. D. Gottlieb (1985) suggested that the apogamous triploid is an autopolyploid derived from sexual diploid populations. The apogamous tetraploid apparently resulted from hybridization between diploid and triploid individuals. These cytotypes have not been formally recognized as subspecies because their ranges seem to overlap extensively and because the ploidy level of the type collection of P. andromedifolia is not known.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Pellaea andromedifolia
|author=
|authority=(Kaulfuss) Fée
|rank=species
|parent rank=genus
|synonyms=Pellaea andromedifolia var. pubescens
|basionyms=Pteris andromedifolia
|family=Pteridaceae
|phenology=Sporulating late spring–summer.
|habitat=Rocky slopes and ledges, usually on igneous substrates
|elevation=0–1500 m
|distribution=Calif.;Oreg.;Mexico in Baja California.
|reference=None
|publication title=
|publication year=1852
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_826.xml
|genus=Pellaea
|species=Pellaea andromedifolia
}}<!--

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