View source for Acoraceae

{{Treatment/ID
|accepted_name=Acoraceae
|accepted_authority=Martinov
|publications=
|common_names=Sweet-Flag Family
|basionyms=
|synonyms=
|hierarchy=Acoraceae
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Acoraceae]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=page 124
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--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, wetland, usually with aromatic oil, especially in rhizomes. <b>Rhizomes</b> horizontal, creeping at or near surface, branched. <b>Stems</b> repent, branched rhizomes. <b>Cataphylls</b> absent. <b>Leaves</b> not differentiated into petiole and blade, equitant, sword-shaped, larger than 1.5 cm; venation parallel along length of leaf. <b>Inflorescences</b>: spadices, from 3-angled axis (peduncle fused with proximal portion of sympodial leaf, i.e., leaf encircling terminal inflorescence), distal sympodial leaf extending beyond spadix; true spathe absent; spadix nearly cylindric, tapering, apex obtuse. <b>Flowers</b> bisexual; tepals 6; stamens 6, distinct; ovariesy 1, (1–)3-locular, sessile; stigmas sessile (styles essentially absent), minute. <b>Fruits</b> berries; pericarp thin, leathery. <b>Seeds</b> 1–6(–14), from apex of locule.</span><!--

-->{{Treatment/Body
|distribution=Temperate Northern Hemisphere;tropical Asia at higher elevations;and sporadically introduced into Southern Hemisphere.
|discussion=<p><i>Acorus</i> historically was recognized as an aberrant genus within Araceae, but much evidence supports its treatment as a separate family and the removal of this family from Arales (M. H. Grayum 1987). Other than the absence of a close association with Arales, the phylogenetic affinities of Acoraceae remain unclear. Evidence based on DNA sequences fails to show any close relationships between <i>Acorus</i> and other genera, and instead supports <i>Acorus</i> as the oldest extant lineage of monocotyledons (M. R. Duvall et al. 1993).</p><!--
--><p>The removal of <i>Acorus</i> from Araceae is supported by the absence of a spathe and the unique vasculature of the structure traditionally interpreted as a spathe (T. S. Ray 1987). The structure that has been called a spathe in <i>Acorus</i> is not morphologically equivalent to the spathe of Araceae; instead it is interpreted as the distal part of the sympodial leaf. The proximal part of the sympodial leaf is adnate to the peduncle, forming a 3-angled axis that bears the inflorescence.</p><!--
--><p>Genera 1, species 3–6 (2 species in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=grayum1987a
|text=Grayum, M. H. 1987. A summary of evidence and arguments supporting the removal of Acorus from the Araceae. Taxon 36: 723--729.
}}{{Treatment/Reference
|id=thompson1995b
|text=Thompson, S. A. 1995. Systematics and Biology of the Araceae and Acoraceae of Temperate North America. Ph.D. dissertation. University of Illinois. Urbana-Champaign.
}}
}}<!--

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-->{{#Taxon:
name=Acoraceae
|author=Sue A. Thompson
|authority=Martinov
|rank=family
|parent rank=
|synonyms=
|basionyms=
|family=Acoraceae
|illustrator=John Myers
|illustration copyright=Flora of North America Association
|distribution=Temperate Northern Hemisphere;tropical Asia at higher elevations;and sporadically introduced into Southern Hemisphere.
|reference=grayum1987a;thompson1995b
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_275.xml
}}<!--

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