Difference between revisions of "Pteridium aquilinum var. caudatum"

(Linnaeus) Sadebeck

Jahrb. Hamburg. Wiss. Anst. Beih. 3: 5. 1897.

Common names: Lacy bracken
Basionym: Pteris caudata (Linnaeus) Maxon
Synonyms: Pteridium caudatum unknown
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="petiole some measurement"><b>Petiole </b>20–75 cm.</span> <span class="statement" id="st-d0_s1" data-properties="blade shape;blade shape;blade shape;blade shape;blade length;blade width"><b>Blade </b>broadly ovate to deltate, 2–3-pinnate-pinnatifid, 30–100 × 20–80 cm;</span> <span class="statement" id="st-d0_s2" data-properties="hair count;hair course;hair fragility;hair orientation;hair orientation;hair orientation">blades, rachises, and costae usually densely covered abaxially with abundant, straight, stiff, subappressed to spreading hairs.</span> <span class="statement" id="st-d0_s3" data-properties="pinna shape"><b>Pinnae </b>all narrowly to broadly triangular;</span> <span class="statement" id="st-d0_s4" data-properties="terminal segment l w ratio;longer ultimate segment width;longer ultimate segment arrangement;longer ultimate segment width">terminal segment of each pinna ca. 10 times longer than wide, longer ultimate segments several times their width apart, ca. 1–2.5 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 shape;ultimate segment shape">fertile ultimate segments only decurrent, or more decurrent than surcurrent.</span> <span class="statement" id="st-d0_s7" data-properties="outer indusium architecture or shape;outer indusium pubescence"><b>Outer </b>indusia entire, glabrous.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Petiole </b>20–75 cm. <b>Blade</b> broadly ovate to deltate, 2–3-pinnate-pinnatifid, 30–100 × 20–80 cm; blades, rachises, and costae usually densely covered abaxially with abundant, straight, stiff, subappressed to spreading hairs. <b>Pinnae</b> all narrowly to broadly triangular; terminal segment of each pinna ca. 10 times longer than wide, longer ultimate segments several times their width apart, ca. 1–2.5 mm wide. <b>Pinnules</b> at nearly 90° angle to costa; fertile ultimate segments only decurrent, or more decurrent than surcurrent. <b>Outer</b> indusia entire, glabrous.</span><!--
  
 
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|publication year=1897
 
|publication year=1897
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_511.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_511.xml
 
|genus=Pteridium
 
|genus=Pteridium
 
|species=Pteridium aquilinum
 
|species=Pteridium aquilinum
 
|variety=Pteridium aquilinum var. caudatum
 
|variety=Pteridium aquilinum var. caudatum
|angle count=90
 
|blade length=30cm;100cm
 
|blade shape=2-3-pinnate-pinnatifid;broadly ovate;deltate
 
|blade width=20cm;80cm
 
|hair count=abundant
 
|hair course=straight
 
|hair fragility=stiff
 
|hair orientation=subappressed;spreading
 
|longer ultimate segment arrangement=apart
 
|longer ultimate segment width=1mm;2.5mm
 
|outer indusium architecture or shape=entire
 
|outer indusium pubescence=glabrous
 
|petiole some measurement=20cm;75cm
 
|pinna shape=triangular
 
|terminal segment l w ratio=10
 
|ultimate segment reproduction=fertile
 
|ultimate segment shape=more decurrent than surcurrent;decurrent
 
 
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-->[[Category:Treatment]][[Category:Pteridium aquilinum]]
 
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Revision as of 13:22, 27 July 2019

Petiole 20–75 cm. Blade broadly ovate to deltate, 2–3-pinnate-pinnatifid, 30–100 × 20–80 cm; blades, rachises, and costae usually densely covered abaxially with abundant, straight, stiff, subappressed to spreading hairs. Pinnae all narrowly to broadly triangular; terminal segment of each pinna ca. 10 times longer than wide, longer ultimate segments several times their width apart, ca. 1–2.5 mm wide. Pinnules at nearly 90° angle to costa; fertile ultimate segments only decurrent, or more decurrent than surcurrent. Outer indusia entire, glabrous.


Habitat: In barrens, pine woodlands, and edges of deciduous woods in strongly acid to circumneutral soil, forming large colonies in exposed sites
Elevation: 0 m

Distribution

V2 511-distribution-map.gif

Fla., Mexico, West Indies, Bermuda, Central America, South America from Colombia to Peru.

Discussion

In Florida and West Indies material, the abaxial surfaces are quite hairy; in Central American material they are often much less hairy.

Selected References

None.

Lower Taxa

None.
Carol A. Jacobs +  and James H. Peck +
(Linnaeus) Sadebeck +
Pteris caudata +
Lacy bracken +
Fla. +, Mexico +, West Indies +, Bermuda +, Central America +  and South America from Colombia to Peru. +
In barrens, pine woodlands, and edges of deciduous woods in strongly acid to circumneutral soil, forming large colonies in exposed sites +
Jahrb. Hamburg. Wiss. Anst. Beih. +
Illustrated +
Pteridium caudatum +
Pteridium aquilinum var. caudatum +
Pteridium aquilinum +
variety +