View source for Dichaetophora

{{Treatment/ID
|accepted_name=Dichaetophora
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Mem. Amer. Acad. Arts, n. s.
|place=4: 73. 1849
|year=1849
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Dichaetophora
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Dichaetophora]]</div></div>
|etymology=Greek di - two, chaite, long hair, and - phore, bearer or carrier, alluding to the two awnlike pappus elements
|volume=Volume 20
|mention_page=page 11, 204
|treatment_page=page 205
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 4–24 cm (taprooted). <b>Stems</b> erect or decumbent, simple or branched, sparsely strigose. <b>Leaves</b> basal and cauline; alternate; petiolate to subpetiolate; blades 1-nerved, oblanceolate, margins entire, apices mostly obtuse, faces sparsely strigose. <b>Heads</b> radiate, borne singly. <b>Involucres</b> hemispheric, (3–4.5 ×) 5–7 mm. <b>Phyllaries</b> 16–25 in 2 series, 1-nerved (midnerves not evident; flat), broadly oblanceolate to lanceolate, subequal, margins broadly scarious, hyaline (apices acute to obtuse), glabrous. <b>Receptacles</b> convex to conic, smooth, epaleate. <b>Ray</b> florets 15–25, pistillate, fertile; corollas lavender-tinged abaxially, white adaxially, and often drying with a bluish purple midstripe. <b>Disc</b> florets (20–)45–75, bisexual, fertile; corollas yellow, abruptly contracted, tubes shorter than narrowly tubular throats, lobes 5, erect, triangular; style-branch appendages lanceolate-acute. <b>Cypselae</b> (brownish) obovoid to widely ellipsoid, strongly compressed, margins pale, winglike, piloso-ciliate, body faces sparsely pilose (hairs apically glochidiate), wings glabrous; pappi of 2 ascending, thin, barbellate awns, usually plus elliptic ring of shorter awns. <b>x</b> = 3.</span><!--

-->{{Treatment/Body
|distribution=Tex.;n Mexico.
|discussion=<p>Species 1.</p><!--
--><p><i>Dichaetophora</i> is characterized by its annual habit, oblanceolate leaves, small, white-rayed heads, and broadly scarious-margined phyllaries. The cypselae are primarily 2-awned and have glochidiate hairs (each apical cell abruptly reflexed, together forming a pronged structure) covering the faces and the winged margins. <i>Dichaetophora</i> is similar and apparently closely related to <i>Astranthium</i>; it has the same chromosome number (2n = 6) as northern species of <i>Astranthium</i>. D. S. Correll and M. C. Johnston (1970) commented that <i>Astranthium integrifolium</i> and <i>Dichaetophora</i> are separated by a “few technical differences in achene and pappus...” and “almost certainly... should be congeneric.” This may prove to be the case, but inclusion of the winged and awned cypselae of <i>Dichaetophora</i> would alter the morphologic integrity of <i>Astranthium</i>, and more definitive evidence is needed.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Dichaetophora
|author=Guy L. Nesom
|authority=A. Gray
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Barbara Alongi
|illustration copyright=Flora of North America Association
|distribution=Tex.;n Mexico.
|reference=None
|publication title=Mem. Amer. Acad. Arts, n. s.
|publication year=1849
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V20_455.xml
|tribe=Asteraceae tribe Astereae
|genus=Dichaetophora
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae tribe Astereae]]