View source for Pteris

{{Treatment/ID
|accepted_name=Pteris
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1073. 1753; Gen. Pl. ed 5, 484. 1754
|year=1754
}}
|common_names=Brake
|basionyms=
|synonyms=
|hierarchy=Pteridaceae;Pteris
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pteris]]</div></div>
|etymology=Greek pteris, fern, derived from pteron, wing or feather, for the closely spaced pinnae, which give the leaves a likeness to feathers
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>terrestrial or on rock. <b>Stems</b> erect or creeping, branched; scales pale brown to black, concolored, elongate, margins entire. <b>Leaves</b> monomorphic, clustered or closely spaced, 1–20 dm. <b>Petiole</b> straw-colored, green, brownish red to purple black, longitudinally ridged, 2–3-grooved adaxially, scaly at base, glabrous or scaly distally, with 1 (less often 2 or more) vascular bundle. <b>Blade</b> oblong to lanceolate to deltate, 1–4-pinnate, herbaceous to leathery, abaxially and adaxially glabrous or sometimes pubescent or scaly, adaxially dull, not striate; rachis straight. <b>Ultimate</b> segments of blade sessile to short-stalked, linear to oblong-lanceolate, 1.5–8 mm wide; base truncate or narrowed to stalk, stalk when present green, not lustrous; margins plane or reflexed to form false indusia. <b>Veins</b> in leaves conspicuous, free (except in sori) and forking well above base of segment, or highly anastomosing. <b>False</b> indusia pale, scarious, covering sori. <b>Sporangia</b> intramarginal, sori usually continuous except at pinna or segment apex and sinuses, paraphyses present. <b>Spores</b> brown, trilete, tetrahedral, rugate and/or tuberculate, usually with prominent equatorial flange. <b>x</b> = 29.</span><!--

-->{{Treatment/Body
|distribution=Worldwide;warm and tropical regions.
|discussion=<p>Species ca. 300 (5 species and 1 hybrid in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Veins in leaves anastomosing except sometimes near margins of ultimate segments.
|[[Pteris tripartita|Pteris tripartita]]
|-id=key-0-1
|1
|Veins in leaves entirely free.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaves not strictly 1-pinnate, at least proximal pinnae pinnatifid-lobed or variously forked or divided.
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Leaves strictly 1-pinnate, pinnae not lobed or divided.
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Pinnae of mature leaves decurrent to relatively broad-winged rachis in at least distal 1/2 of leaf.
|[[Pteris multifida|Pteris multifida]]
|-id=key-0-3
|3
|Pinnae of mature leaves not decurrent to relatively broad-winged rachis or only terminal pinna decurrent on rachis.
|[[Pteris cretica|Pteris cretica]]
|-id=key-0-4
|4
|Petioles and often also rachises densely scaly, scales light to reddish, often grading into hairs on abaxial costae; pinnae appearing not articulate to rachis, apices long-attenuate or sharply acute; sori narrow, with most of abaxial blade surface exposed.
|[[Pteris vittata|Pteris vittata]]
|-id=key-0-4
|4
|Petioles often sparsely scaly or scaly only proximally, scales dark brown to nearly black, scales absent or few on rachises, abaxial costae with or without hairs; pinnae appearing articulate to rachis, apices acute; sori broad, little or no abaxial blade tissue exposed.
|[[Pteris bahamensis|Pteris bahamensis]]
|}
</div></div><!--

-->{{#Taxon:
name=Pteris
|author=Clifton E. Nauman
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Pteridaceae
|distribution=Worldwide;warm and tropical regions.
|reference=None
|publication title=Sp. Pl.
|publication year=1754
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V2/V2_9.xml
|genus=Pteris
}}<!--

-->[[Category:Treatment]][[Category:Pteridaceae]]