View source for Acanthoscyphus

{{Treatment/ID
|accepted_name=Acanthoscyphus
|accepted_authority=Small
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=25: 53. 1898
|year=1898
}}
|common_names=Flowery puncturebract
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Oxytheca sect. Acanthoscyphus
|authority=(Small) Ertter
|rank=section
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Acanthoscyphus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Eriogonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Acanthoscyphus]]</div></div>
|etymology=Greek acantha, thorn, and scyphos, cup, alluding to awn on involucre
|volume=Volume 5
|mention_page=page 221, 439
|treatment_page=page 437
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual; taproot slender. <b>Stems</b> arising directly from the root, erect to somewhat spreading, solid, not fistulose or disarticulating into ringlike segments, glabrous, partially glandular. <b>Leaves</b> usually persistent through anthesis, basal, rosulate; petiole indistinct; blade broadly obovate or spatulate to oblong or oblanceolate, margins ciliate-denticulate. <b>Inflorescences</b> terminal, cymose; branches dichotomous, not brittle or disarticulating into segments, round, glabrous except for glandular nodes and proximal 1/2 of internode; bracts 2–3, connate basally, scalelike, triangular to lanceolate or subulate, awned at proximal nodes, glabrous or sparsely glandular. <b>Peduncles</b> erect to deflexed. <b>Involucres</b> 1 per node, not ribbed, tubular, turbinate; teeth 4(–5) or 7–30(–36), 1/2 to completely connate, awn-tipped, glandular distally adaxially. <b>Flowers</b> 3–10(–20) per involucre at any single time during full anthesis; perianth white to rose, occasionally greenish white to cream, broadly campanulate when open, narrowly urceolate when closed, hirsute to strigose and sparsely glandular abaxially; tepals 6, connate 1/4–1/3 their length, monomorphic, entire or rarely irregularly divided apically; stamens 9; filaments basally adnate, glabrous or sparsely pubescent basally; anthers red to maroon, oblong to oval. <b>Achenes</b> usually included, dark brown to deep maroon, not winged, globose-lenticular, glabrous. <b>Seeds</b>: embryo curved. <b>x</b> = 20.</span><!--

-->{{Treatment/Body
|distribution=s Calif.
|discussion=<p>Species 1.</p><!--
--><p><i>Acanthoscyphus</i> is allied to <i>Eriogonum </i>subg.<i> Ganysma</i>, specifically to <i>E. parishii</i>, <i>E. apiculatum</i>, and their close relatives. It is distinguished from <i>Eriogonum</i> by its awned involucres.</p>
|tables=
|references={{Treatment/Reference
|id=ertter1980a
|text=Ertter, B. 1980. A revision of the genus Oxytheca (Polygonaceae). Brittonia 32: 70–102.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Acanthoscyphus
|author=James L. Reveal
|authority=Small
|rank=genus
|parent rank=subfamily
|synonyms=Oxytheca sect. Acanthoscyphus
|basionyms=
|family=Polygonaceae
|distribution=s Calif.
|reference=ertter1980a
|publication title=Bull. Torrey Bot. Club
|publication year=1898
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_911.xml
|subfamily=Polygonaceae subfam. Eriogonoideae
|genus=Acanthoscyphus
}}<!--

-->[[Category:Treatment]][[Category:Polygonaceae subfam. Eriogonoideae]]