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><!--

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|distribution=Temperate Northern Hemisphere;tropical Asia at higher elevations;and sporadically introduced into Southern Hemisphere.
|discussion=<p>Acorus 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 Acorus and other genera, and instead supports Acorus as the oldest extant lineage of monocotyledons (M. R. Duvall et al. 1993).</p><!--
--><p>The removal of Acorus 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 Acorus 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
|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://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_275.xml
}}<!--

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