View source for Crataegus opaca

{{Treatment/ID
|accepted_name=Crataegus opaca
|accepted_authority=Hooker & Arnott
|publications={{Treatment/Publication
|title=Compan. Bot. Mag.
|place=1: 25. 1835
|year=1835
}}
|common_names=Western mayhaw
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Gillenieae;Crataegus;Crataegus sect. Coccineae;Crataegus (sect. Coccineae) ser. Aestivales;Crataegus opaca
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Amygdaloideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Gillenieae]]</div><div class="higher-taxon"><small>genus</small>[[Crataegus]]</div><div class="higher-taxon"><small>section</small>[[Crataegus sect. Coccineae]]</div><div class="higher-taxon"><small>series</small>[[Crataegus (sect. Coccineae) ser. Aestivales]]</div><div class="higher-taxon"><small>species</small>[[Crataegus opaca]]</div></div>
|volume=Volume 9
|mention_page=page 546
|treatment_page=page 547
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Trees,</b> 80+ dm. <b>Stems</b>: trunks 0.3 m diam.; twigs: new growth rufous-tomentose, 1-year old medium to dark gray; thorns on twigs 2-years old dark gray to black, 2–4 cm. <b>Leaves</b>: petiole 4–7 mm, length 10–15% blade, short rufous-tomentose; blade ± elliptic to lance-elliptic, sometimes broadly elliptic, 5–7 cm, lobes 0 or sinuate (sometimes more deeply and irregularly lobed on vegetative shoots, then lobes often wider), margins entire or obscurely or shallowly crenate distally, teeth gland-dotted, veins 5–9(or 10) per side, apex subacute to acute, abaxial surface rufous-tomentose, especially along veins, sometimes glabrescent, adaxial usually dull, scabrous, especially young. <b>Inflorescences</b> ± sessile or in 3–6-flowered umbels; branches absent or short, glabrous; bracteoles few, oblong-linear, margins glandular. <b>Flowers</b> precocious, 12.5–17.5 mm diam.; hypanthium glabrous; sepals 4 mm, margins entire or slightly glandular-serrate; petals white to sometimes pale pink, 7 mm; anthers reddish or rose, 1 mm; styles 4 or 5. <b>Pomes</b> red, sometimes yellow, (8–)12–15 mm diam.; pyrenes 4 or 5. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering Feb–Mar; fruiting May–Jun.
|habitat=Seasonally inundated depressions, ditches, sink holes, relict interdune swales, streamsides
|elevation=10–100 m
|distribution=Ala.;La.;Miss.;Tex.
|discussion=<p><i>Crataegus opaca</i> occurs from eastern Texas to Alabama, is most common in Louisiana, and is apparently rare east of the Pearl River, Mississippi. The fruit is edible and used locally for conserves.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Crataegus opaca
|authority=Hooker & Arnott
|rank=species
|parent rank=series
|synonyms=
|basionyms=
|family=Rosaceae
|phenology=Flowering Feb–Mar; fruiting May–Jun.
|habitat=Seasonally inundated depressions, ditches, sink holes, relict interdune swales, streamsides
|elevation=10–100 m
|distribution=Ala.;La.;Miss.;Tex.
|reference=None
|publication title=Compan. Bot. Mag.
|publication year=1835
|special status=Endemic;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_925.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Gillenieae
|genus=Crataegus
|section=Crataegus sect. Coccineae
|series=Crataegus (sect. Coccineae) ser. Aestivales
|species=Crataegus opaca
}}<!--

-->[[Category:Treatment]][[Category:Crataegus (sect. Coccineae) ser. Aestivales]]