View source for Pityrogramma

{{Treatment/ID
|accepted_name=Pityrogramma
|accepted_authority=Link
|publications={{Treatment/Publication
|title=Handbuch
|place=3: 19. 1833
|year=1833
}}
|common_names=Silverback fern;goldback fern
|basionyms=
|synonyms=
|hierarchy=Pteridaceae;Pityrogramma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pityrogramma]]</div></div>
|etymology=Greek pityros, bran, and gramma, lines (as in written characters), referring to the farina covering the abaxial leaf blade surface
|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 nearly so, unbranched; scales brown, concolored or nearly so, lanceolate, margins entire. <b>Leaves</b> monomorphic, closely spaced, 25–150 cm. <b>Petiole</b> black to purplish black or reddish brown, longitudinally grooved adaxially, glabrous, with 2(–3) vascular bundles. <b>Blade</b> linear-lanceolate to ovate or elongate-triangular, 1–4-pinnate, herbaceous to leathery, abaxially usually farinose, farina white or yellow, sometimes partially or completely replaced by trichomes, adaxially glabrous, dull, not striate; rachis straight. <b>Ultimate</b> segments stalked or sessile, free from costa or partially adnate to it, narrowly triangular to linear, entire or lobed; base narrowly cuneate, stalks when present green, not lustrous; margins not recurved to form false indusia. <b>Veins</b> of ultimate segments free, obscure, pinnately branched and divergent distally. <b>False</b> indusia absent. <b>Sporangia</b> scattered along veins, containing 32 or 64 spores, intermixed with farina-producing glands. <b>Spores</b> tan with dark brown ridges, tetrahedral-globose, perispore usually reticulate, with equatorial flange (except in <i>Pityrogramma trifoliata</i>). <b>Gametophytes</b> glabrous.</span><!--

-->{{Treatment/Body
|distribution=Primarily neotropical;some in Africa;introduced elsewhere in Eastern Hemisphere.
|discussion=<p>The name Nesoris bicolor Rafinesque was based on a yellow-farinose plant from Florida and presumably represents a species of <i>Pityrogramma</i>. A type has not been located, and C. S. Rafinesque's (1836[–1838]b, part 4) description is not precise enough to permit equation of this name with modern nomenclature. No yellow-farinose <i>Pityrogramma</i> has since been reported from Florida.</p><!--
--><p><i>Pentagramma</i> has been segregated from <i>Pityrogramma</i> (G. Yatskievych et al. 1990) and comprises what was the <i>Pityrogramma</i> triangularis (Kaulfuss) Maxon complex.</p><!--
--><p>Species ca. 15 (2 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
|Distal pinnae pinnately lobed or divided, narrowly triangular.
|[[Pityrogramma calomelanos var. calomelanos|Pityrogramma calomelanos var. calomelanos]]
|-id=key-0-1
|1
|Distal pinnae entire or serrulate, linear to narrowly lanceolate.
|[[Pityrogramma trifoliata|Pityrogramma trifoliata]]
|}
</div></div><!--

-->{{#Taxon:
name=Pityrogramma
|author=George Yatskievych;Michael D. Windham
|authority=Link
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Pteridaceae
|distribution=Primarily neotropical;some in Africa;introduced elsewhere in Eastern Hemisphere.
|reference=None
|publication title=Handbuch
|publication year=1833
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V2/V2_643.xml
|genus=Pityrogramma
}}<!--

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