View source for Pteridium

{{Treatment/ID
|accepted_name=Pteridium
|accepted_authority=Gleditsch ex Scopoli
|publications={{Treatment/Publication
|title=Fl. Carniol.
|place=169. 1760
|year=1760
}}
|basionyms=
|synonyms=
|hierarchy=Dennstaedtiaceae;Pteridium
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dennstaedtiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pteridium]]</div></div>
|etymology=Greek pteridion, a small fern
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>terrestrial, often forming colonies or thickets. <b>Stems</b> subterranean, slender, long-creeping; hairs pale to dark, jointed; scales absent; true vessels present (absent in other Dennstaedtiaceae genera in the flora). <b>Leaves</b> widely spaced, broadly deltate, 0.5–4.5 m. <b>Petiole</b> glabrous to short-hairy, without prickles, with stem buds near base, vascular bundles numerous, U- or O-shaped in cross section. <b>Blade</b> 2–4-pinnate, rachis and costae grooved adaxially; rachis without prickles; nectaries at base of proximal and sometimes distal pinnae. <b>Segments</b> pinnately divided, ultimate segments ovate to oblong to linear, base extending proximally on costae (decurrent) or proximally (surcurrent), margins entire. <b>Veins</b> free or joined at margin by commissural vein beneath sori, pinnately 2–3-forked. <b>Sori</b> ± continuous, covered by recurved, outer false indusium and obscure, extrorse, inner true indusium. <b>Spores</b> tetrahedral-globose, trilete, very finely granulate. <b>x</b> = 26.</span><!--

-->{{Treatment/Body
|distribution=Almost worldwide.
|discussion=<p>Species 1 (1 species, 4 varieties in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=page1976a
|text=Page, C. N. 1976. The taxonomy and phytogeography of bracken---A review. J. Linn. Soc., Bot. 73: 1--34.
}}{{Treatment/Reference
|id=perring1976a
|text=Perring, F. H. and B. G. Gardener, eds. 1976. The biology of bracken. [Symposium.] J. Linn. Soc., Bot. 73(1--3): i--vi, 1--302.
}}{{Treatment/Reference
|id=tryon1941a
|text=Tryon, R. M. 1941. A revision of the genus Pteridium. Rhodora 43: 1--31, 37--67.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Pteridium
|author=Carol A. Jacobs;James H. Peck
|authority=Gleditsch ex Scopoli
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Dennstaedtiaceae
|distribution=Almost worldwide.
|reference=page1976a;perring1976a;tryon1941a
|publication title=Fl. Carniol.
|publication year=1760
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_803.xml
|genus=Pteridium
}}<!--

-->[[Category:Treatment]][[Category:Dennstaedtiaceae]]