View source for Pellaea intermedia

{{Treatment/ID
|accepted_name=Pellaea intermedia
|accepted_authority=Mettenius ex Kuhn
|publications={{Treatment/Publication
|title=Linnaea
|place=38: 84. 1869
|year=1869
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Pellaea intermedia var. pubescens
|authority=Mettenius ex Kuhn
}}
|hierarchy=Pteridaceae;Pellaea;Pellaea intermedia
|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 intermedia]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="stem growth form or orientation;stem orientation;stem size;stem diameter"><b>Stems </b>creeping, horizontal, slender, 2–4 mm diam.;</span> <span class="statement" id="st-d0_s1" data-properties="scale coloration;scale shape;largest scale width;center coloration;center width;margin coloration;margin width;margin architecture or shape">scales mostly bicolored, narrowly lanceolate, largest scales 0.3–0.8 mm wide, centers black, thick, margins brown, thin, irregularly dentate.</span> <span class="statement" id="st-d0_s2" data-properties="leaf architecture;leaf arrangement;leaf some measurement"><b>Leaves </b>monomorphic, widely scattered along stem, 12–50 cm;</span> <span class="statement" id="st-d0_s3" data-properties="crozier pubescence;scale count">croziers pubescent and bearing a few scales.</span> <span class="statement" id="st-d0_s4" data-properties="petiole coloration;petiole coloration;petiole coloration;petiole coloration;petiole coloration;petiole reflectance;petiole shape;petiole shape;articulation line prominence"><b>Petiole </b>straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines.</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade shape;blade shape;blade architecture or shape;blade width"><b>Blade </b>ovate to elongate-deltate, usually 2-pinnate proximally, 4–20 cm wide;</span> <span class="statement" id="st-d0_s6" data-properties="rachis coloration;rachis course;rachis course;rachis course;rachis shape;rachis shape;rachis pubescence">rachis tan throughout, straight to slightly flexuous, rounded or flattened adaxially, ± pubescent.</span> <span class="statement" id="st-d0_s7" data-properties="pinna orientation;rachis orientation;rachis shape;ultimate segment count"><b>Pinnae </b>perpendicular to rachis or slightly ascending, not decurrent on rachis, usually with 7–21 ultimate segments;</span> <span class="statement" id="st-d0_s8" data-properties="costa course;costa course;costa course;costa some measurement;costa length or size">costae straight to slightly flexuous, 20–100 mm, longer than ultimate segments.</span> <span class="statement" id="st-d0_s9" data-properties="ultimate segment shape;ultimate segment shape;ultimate segment shape;ultimate segment some measurement;ultimate segment texture;ultimate segment pubescence;ultimate segment pubescence"><b>Ultimate </b>segments ovate to elliptic, 5–15 mm, leathery, glabrous or usually puberulent abaxially;</span> <span class="statement" id="st-d0_s10" data-properties="margin orientation;segment reproduction;abaxial surface count;border coloration;border architecture or shape">margins recurved on fertile segments, usually covering less than 1/2 abaxial surface, borders whitish, nearly entire;</span> <span class="statement" id="st-d0_s11" data-properties="apex shape;apex shape;apex shape">apex obtuse to slightly mucronate.</span> <span class="statement" id="st-d0_s12" data-properties="vein prominence"><b>Veins </b>of ultimate segments obscure.</span> <span class="statement" id="st-d0_s13" data-properties="spore count"><b>Sporangia </b>short-stalked, containing 32 spores, not intermixed with farina-producing glands.</span> <span class="statement" id="st-d0_s14" data-properties="sporangium architecture;n=2n chromosome count;n=2n chromosome count">n = 2n = 87, 116, apogamous.</span><!--

-->{{Treatment/Body
|habitat=Rocky slopes and ledges, on a variety of substrates, including limestone and granite
|elevation=300–2400 m
|distribution=Ariz.;N.Mex.;Tex.;n Mexico.
|discussion=<p>Plants of Pellaea intermedia in the flora are apogamous triploids and tetraploids; a sexual diploid cytotype has been found near Saltillo, Mexico (A. F. Tryon 1968). Given the high degree of morphologic similarity among the three cytotypes, the North American polyploids probably were derived from the Mexican diploid through autopolyploidy.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Pellaea intermedia
|author=
|authority=Mettenius ex Kuhn
|rank=species
|parent rank=genus
|synonyms=Pellaea intermedia var. pubescens
|basionyms=
|family=Pteridaceae
|habitat=Rocky slopes and ledges, on a variety of substrates, including limestone and granite
|elevation=300–2400 m
|distribution=Ariz.;N.Mex.;Tex.;n Mexico.
|reference=None
|publication title=Linnaea
|publication year=1869
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_567.xml
|genus=Pellaea
|species=Pellaea intermedia
|abaxial surface count=0;1/2
|apex shape=obtuse;slightly mucronate
|articulation line prominence=prominent
|blade architecture or shape=2-pinnate
|blade shape=ovate;elongate-deltate
|blade width=4cm;20cm
|border architecture or shape=entire
|border coloration=whitish
|center coloration=black
|center width=thick
|costa course=straight;slightly flexuous
|costa length or size=longer
|costa some measurement=20mm;100mm
|crozier pubescence=pubescent
|largest scale width=0.3mm;0.8mm
|leaf architecture=monomorphic
|leaf arrangement=scattered
|leaf some measurement=12cm;50cm
|margin architecture or shape=dentate
|margin coloration=brown
|margin orientation=recurved
|margin width=thin
|n=2n chromosome count=116;87
|petiole coloration=gray;tan;gray;tan;straw-colored
|petiole reflectance=not lustrous
|petiole shape=flattened;rounded
|pinna orientation=perpendicular
|rachis coloration=tan
|rachis course=straight;slightly flexuous
|rachis orientation=ascending
|rachis pubescence=pubescent
|rachis shape=not decurrent;flattened;rounded
|scale coloration=bicolored
|scale count=few
|scale shape=lanceolate
|segment reproduction=fertile
|sporangium architecture=short-stalked
|spore count=32
|stem diameter=2mm;4mm
|stem growth form or orientation=creeping
|stem orientation=horizontal
|stem size=slender
|ultimate segment count=7;21
|ultimate segment pubescence=puberulent;glabrous
|ultimate segment shape=ovate;elliptic
|ultimate segment some measurement=5mm;15mm
|ultimate segment texture=leathery
|vein prominence=obscure
}}<!--

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