Difference between revisions of "Pteridium aquilinum var. pubescens"

L. Underwood

Native Ferns ed. 6 91. 1900.

Common names: Western bracken
Basionym: Pteris aquilina var. pubescens (L. Underwood) Clute
Treatment appears in FNA Volume 2. Mentioned on page 203.
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--><span class="statement" id="st-d0_s0" data-properties="petiole some measurement"><b>Petiole </b>10–100 cm.</span> <span class="statement" id="st-d0_s1" data-properties="blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade length;blade width"><b>Blade </b>ovate-triangular to nearly pentagonal, 3-pinnate to 3-pinnate-pinnatifid, 30–200 × 15–100 cm;</span> <span class="statement" id="st-d0_s2" data-properties="hair count;hair arrangement or shape;hair architecture or arrangement;hair orientation">blades, rachises, and costae usually densely covered abaxially with abundant, contorted, lax, spreading hairs.</span> <span class="statement" id="st-d0_s3" data-properties="pinna shape;distal pinna shape"><b>Pinnae </b>(proximal) triangular, distal pinnae oblong;</span> <span class="statement" id="st-d0_s4" data-properties="terminal segment l w ratio;longer ultimate segment width">terminal segment of each pinna ca. 4 times longer than wide, longer ultimate segments less than their width apart, ca. 1.5–5 mm wide.</span> <span class="statement" id="st-d0_s5" data-properties="angle count"><b>Pinnules </b>at nearly 90° angle to costa;</span> <span class="statement" id="st-d0_s6" data-properties="ultimate segment reproduction;ultimate segment fusion;ultimate segment shape;ultimate segment orientation">fertile ultimate segments adnate or equally decurrent and surcurrent.</span> <span class="statement" id="st-d0_s7" data-properties="outer indusium architecture or shape;outer indusium pubescence"><b>Outer </b>indusia entire, pilose on margin and surface, hairs like those of axes.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Petiole </b>10–100 cm. <b>Blade</b> ovate-triangular to nearly pentagonal, 3-pinnate to 3-pinnate-pinnatifid, 30–200 × 15–100 cm; blades, rachises, and costae usually densely covered abaxially with abundant, contorted, lax, spreading hairs. <b>Pinnae</b> (proximal) triangular, distal pinnae oblong; terminal segment of each pinna ca. 4 times longer than wide, longer ultimate segments less than their width apart, ca. 1.5–5 mm wide. <b>Pinnules</b> at nearly 90° angle to costa; fertile ultimate segments adnate or equally decurrent and surcurrent. <b>Outer</b> indusia entire, pilose on margin and surface, hairs like those of axes.</span><!--
  
 
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|publication year=1900
 
|publication year=1900
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_458.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_458.xml
 
|genus=Pteridium
 
|genus=Pteridium
 
|species=Pteridium aquilinum
 
|species=Pteridium aquilinum
 
|variety=Pteridium aquilinum var. pubescens
 
|variety=Pteridium aquilinum var. pubescens
|angle count=90
 
|blade length=30cm;200cm
 
|blade shape=ovate-triangular;nearly pentagonal 3-pinnate
 
|blade width=15cm;100cm
 
|distal pinna shape=oblong
 
|hair architecture or arrangement=lax
 
|hair arrangement or shape=contorted
 
|hair count=abundant
 
|hair orientation=spreading
 
|longer ultimate segment width=1.5mm;5mm
 
|outer indusium architecture or shape=entire
 
|outer indusium pubescence=pilose
 
|petiole some measurement=10cm;100cm
 
|pinna shape=triangular
 
|terminal segment l w ratio=4
 
|ultimate segment fusion=adnate
 
|ultimate segment orientation=surcurrent
 
|ultimate segment reproduction=fertile
 
|ultimate segment shape=decurrent
 
 
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Revision as of 14:21, 27 July 2019

Petiole 10–100 cm. Blade ovate-triangular to nearly pentagonal, 3-pinnate to 3-pinnate-pinnatifid, 30–200 × 15–100 cm; blades, rachises, and costae usually densely covered abaxially with abundant, contorted, lax, spreading hairs. Pinnae (proximal) triangular, distal pinnae oblong; terminal segment of each pinna ca. 4 times longer than wide, longer ultimate segments less than their width apart, ca. 1.5–5 mm wide. Pinnules at nearly 90° angle to costa; fertile ultimate segments adnate or equally decurrent and surcurrent. Outer indusia entire, pilose on margin and surface, hairs like those of axes.


Habitat: In dry to moist woods and open areas in partial to full sun, forming abundant colonies
Elevation: 0–3000 m

Distribution

V2 458-distribution-map.gif

Alta., B.C., Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., S.Dak., Tex., Utah, Wash., Wyo., Mexico in Baja California, Chihuahua, and Durango.

Discussion

Selected References

None.

Lower Taxa

None.
Carol A. Jacobs +  and James H. Peck +
L. Underwood +
Pteris aquilina var. pubescens +
Western bracken +
Alta. +, B.C. +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wyo. +, Mexico in Baja California +, Chihuahua +  and and Durango. +
0–3000 m +
In dry to moist woods and open areas in partial to full sun, forming abundant colonies +
Native Ferns ed. 6 +
Illustrated +
Pteridium aquilinum var. pubescens +
Pteridium aquilinum +
variety +