View source for Pellaea truncata

{{Treatment/ID
|accepted_name=Pellaea truncata
|accepted_authority=Goodding
|publications={{Treatment/Publication
|title=Muhlenbergia
|place=8: 94. 1912
|year=1912
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Pellaea longimucronata
|authority=Hooker
}}{{Treatment/ID/Synonym
|name=Pellaea wrightiana var. longimucronata
|authority=(Hooker) Davenport
}}
|hierarchy=Pteridaceae;Pellaea;Pellaea truncata
|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 truncata]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="stem architecture or arrangement;stem orientation;stem fragility or size;stem diameter"><b>Stems </b>compact, ascending, stout, 5–10 mm diam.;</span> <span class="statement" id="st-d0_s1" data-properties="scale coloration;scale shape;scale width;center coloration;center width;margin coloration;margin width;margin architecture or shape">scales bicolored, linear-subulate, 0.1–0.3 mm wide, centers black, thick, margins brown, thin, erose-dentate.</span> <span class="statement" id="st-d0_s2" data-properties="leaf growth form;leaf reproduction;leaf height or length or size;leaf shape;leaf arrangement or growth form;leaf some measurement;leaf reproduction"><b>Leaves </b>somewhat dimorphic, sterile leaves shorter and less divided than fertile leaves, clustered on stems, 8–40 cm;</span> <span class="statement" id="st-d0_s3" data-properties="crozier pubescence">croziers sparsely villous.</span> <span class="statement" id="st-d0_s4" data-properties="petiole coloration;petiole reflectance;petiole shape;petiole architecture;articulation line prominence"><b>Petiole </b>dark-brown, lustrous, flattened or slightly grooved adaxially, without prominent articulation lines.</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade architecture or shape;blade width"><b>Blade </b>ovate-deltate, usually 2-pinnate proximally, 4–18 cm wide;</span> <span class="statement" id="st-d0_s6" data-properties="rachis coloration;rachis course;rachis architecture;rachis pubescence">rachis brown throughout, straight, shallowly grooved adaxially, usually glabrous.</span> <span class="statement" id="st-d0_s7" data-properties="pinna orientation;pinna shape;rachis orientation;ultimate segment count"><b>Pinnae </b>perpendicular to rachis to slightly ascending, not decurrent on rachis, usually with 9–25 ultimate segments;</span> <span class="statement" id="st-d0_s8" data-properties="costa course;costa some measurement;costa length or size;ultimate segment reproduction">costae straight, 20–70 mm, much longer than fertile ultimate segments.</span> <span class="statement" id="st-d0_s9" data-properties="ultimate segment shape;ultimate segment some measurement;ultimate segment texture;ultimate segment pubescence"><b>Ultimate </b>segments narrowly oblong, 4–10 mm, leathery, glabrous;</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 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;gland count"><b>Sporangia </b>long-stalked, containing 64 spores, intermixed with abundant farina-producing glands.</span> <span class="statement" id="st-d0_s14" data-properties="sporangium architecture;2n chromosome count">2n = 58.</span><!--

-->{{Treatment/Body
|habitat=Cliffs and rocky slopes, on various substrates but rarely observed on limestone
|elevation=600–2500 m
|distribution=Ariz.;Calif.;Colo.;Nev.;N.Mex.;Tex.;Utah;n Mexico.
|discussion=<p>Most manuals refer to Pellaea truncata as P. longimucronata, a name shown to be invalid by A. Cronquist et al. (1972+, vol. 1). Populations located near the range of P. mucronata in the Mojave Desert are often difficult to identify because of the subtlety of the characters involved and an apparent tendency to produce sterile (and possibly fertile) hybrids. Morphologically intermediate hybrids between P. truncata and P. wrightiana are common in regions where the ranges of the two species overlap, but these are easily identified by their malformed spores.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Pellaea truncata
|author=
|authority=Goodding
|rank=species
|parent rank=genus
|synonyms=Pellaea longimucronata;Pellaea wrightiana var. longimucronata
|basionyms=
|family=Pteridaceae
|habitat=Cliffs and rocky slopes, on various substrates but rarely observed on limestone
|elevation=600–2500 m
|distribution=Ariz.;Calif.;Colo.;Nev.;N.Mex.;Tex.;Utah;n Mexico.
|reference=None
|publication title=Muhlenbergia
|publication year=1912
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_8.xml
|genus=Pellaea
|species=Pellaea truncata
|2n chromosome count=58
|abaxial surface count=0;1/2
|apex shape=mucronate
|articulation line prominence=prominent
|blade architecture or shape=2-pinnate
|blade shape=ovate-deltate
|blade width=4cm;18cm
|border architecture or shape=entire
|border coloration=whitish
|center coloration=black
|center width=thick
|costa course=straight
|costa length or size=much longer
|costa some measurement=20mm;70mm
|crozier pubescence=villous
|gland count=abundant
|leaf arrangement or growth form=clustered
|leaf growth form=dimorphic
|leaf height or length or size=shorter
|leaf reproduction=fertile;sterile
|leaf shape=divided
|leaf some measurement=8cm;40cm
|margin architecture or shape=erose-dentate
|margin coloration=brown
|margin orientation=recurved
|margin width=thin
|petiole architecture=grooved
|petiole coloration=dark-brown
|petiole reflectance=lustrous
|petiole shape=flattened
|pinna orientation=perpendicular
|pinna shape=not decurrent
|rachis architecture=grooved
|rachis coloration=brown
|rachis course=straight
|rachis orientation=ascending
|rachis pubescence=glabrous
|scale coloration=bicolored
|scale shape=linear-subulate
|scale width=0.1mm;0.3mm
|segment reproduction=fertile
|sporangium architecture=long-stalked
|spore count=64
|stem architecture or arrangement=compact
|stem diameter=5mm;10mm
|stem fragility or size=stout
|stem orientation=ascending
|ultimate segment count=9;25
|ultimate segment pubescence=glabrous
|ultimate segment reproduction=fertile
|ultimate segment shape=oblong
|ultimate segment some measurement=4mm;10mm
|ultimate segment texture=leathery
|vein prominence=obscure
}}<!--

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