View source for Pellaea gastonyi

{{Treatment/ID
|accepted_name=Pellaea gastonyi
|accepted_authority=Windham
|publications={{Treatment/Publication
|title=Contr. Univ. Michigan Herb.
|place=19: 36. 1993
|year=1993
}}
|basionyms=
|synonyms=
|hierarchy=Pteridaceae;Pellaea;Pellaea gastonyi
|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 gastonyi]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>compact, ascending, stout, 5–10 mm diam.; scales uniformly reddish brown, linear-subulate, 0.1–0.3 mm wide, thin, margins entire to denticulate. <b>Leaves</b> somewhat dimorphic, sterile leaves shorter than fertile leaves, clustered on stem, 8–25 cm; croziers villous. <b>Petiole</b> reddish purple to dark brown, lustrous, rounded adaxially, without prominent articulation lines. <b>Blade</b> elongate-deltate to lanceolate, 2-pinnate proximally, 3–6 cm wide; rachis purple or brown throughout, straight, rounded adaxially, sparsely villous with long, divergent hairs. <b>Pinnae</b> ascending or perpendicular to rachis, not decurrent on rachis or obscurely so, usually with 3–7 ultimate segments; costae straight, 2–30 mm, usually shorter than ultimate segments. <b>Ultimate</b> segments oblong-lanceolate, 7–30 mm, leathery, sparsely villous abaxially near midrib; margins usually recurved on fertile segments, covering less than 1/2 abaxial surface, borders whitish, crenulate; apex obtuse to slightly mucronate. <b>Veins</b> of ultimate segments obscure. <b>Sporangia</b> long-stalked, containing 32 spores, not intermixed with farina-producing glands.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–fall.
|habitat=Calcareous cliffs and ledges, usually on limestone
|elevation=100–1500 m
|distribution=Alta.;B.C.;Sask.;Mo.;S.Dak.;Wyo.
|discussion=<p><i>Pellaea gastonyi</i> is an apogamous tetraploid that has originated through repeated hybridization between <i>P. atropurpurea</i> and <i>P. glabella</i>. Isozyme studies (G. J. Gastony 1988) indicate that <i>P. glabella </i>subsp.<i> missouriensis</i> was the diploid parent of plants found in Missouri, whereas diploid <i>P. glabella </i>subsp.<i> occidentalis</i> was involved in the origin of <i>P. gastonyi</i> populations occurring in western North America. <i>Pellaea gastonyi</i> is most often confused with <i>P. atropurpurea</i>, from which it differs in having sparsely villous rachises, smaller ultimate segments, and spores averaging more than 62 µm in diameter.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Pellaea gastonyi
|author=
|authority=Windham
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Pteridaceae
|phenology=Sporulating summer–fall.
|habitat=Calcareous cliffs and ledges, usually on limestone
|elevation=100–1500 m
|distribution=Alta.;B.C.;Sask.;Mo.;S.Dak.;Wyo.
|reference=None
|publication title=Contr. Univ. Michigan Herb.
|publication year=1993
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_343.xml
|genus=Pellaea
|species=Pellaea gastonyi
}}<!--

-->[[Category:Treatment]][[Category:Pellaea]]