View source for Crataegus pruinosa

{{Treatment/ID
|accepted_name=Crataegus pruinosa
|accepted_authority=(H. L. Wendland) K. Koch
|publications={{Treatment/Publication
|title=Hort. Dendrol.,
|place=168. 1853
|year=1853
}}
|common_names=Frosted hawthorn
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Mespilus pruinosa
|authority=H. L. Wendland
|rank=species
|publication_title=Flora
|publication_place=6: 701. 1823
}}
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Gillenieae;Crataegus;Crataegus sect. Coccineae;Crataegus (sect. Coccineae) ser. Pruinosae;Crataegus pruinosa
|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. Pruinosae]]</div><div class="higher-taxon"><small>species</small>[[Crataegus pruinosa]]</div></div>
|volume=Volume 9
|mention_page=page 493, 522, 543, 563, 571, 572, 575, 577, 637, 642
|treatment_page=page 574
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs </b>or trees, dense, often suberect, 20–70 dm. <b>Stems</b>: compound thorns on trunks present; twigs: new growth reddish brown, 1-year old dull purple-brown, 2-years old dull gray, older paler; thorns on twigs straight to slightly recurved, 2-years old deep purple to shiny black, usually ± fine, 3–5 cm. <b>Leaves</b>: petiole length 50–66% blade, sparsely glandular; blade trullate to ovate, ovate-oblong, or broadly rhombic, rarely ± deltate, 2–6(–7) cm, subcoriaceous, base broadly cuneate to subtruncate to weakly subcordate, lobes (1–)3 or 4 per side, sinuses shallow to deeper, lobe apex acute, sometimes ± obtuse, margins serrate, veins 5 or 6 per side (except smaller leaves), apex acute, surfaces glabrous (except <i></i>var.<i> virella</i>). <b>Inflorescences</b> 5–10-flowered; branches glabrous, sometimes sparsely villous; bracteoles caducous, usually few, margins short-stipitate-glandular. <b>Flowers</b> 15–25 mm diam.; sepals narrowly triangular, 5–6 mm, margins usually entire or subentire, rarely glandular-serrate, abaxially glabrous; stamens (10 or)20, anthers pale pink to bright rose or dull purple, sometimes cream, 0.6–0.8 mm; styles 3–5. <b>Pomes</b> greenish with pink or mauve areas, sometimes bright crimson or scarlet, often rather angular, 10–20 mm diam., highly pruinose, not punctate; flesh hard; sepals on collar, spreading; pyrenes 3–5.</span><!--

-->{{Treatment/Body
|distribution=Ont.;Que.;Ark.;Conn.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Mass.;Mich.;Mo.;N.C.;N.H.;N.J.;N.Y.;Ohio;Pa.;Tenn.;Va.;Vt.;W.Va.;Wis.
|discussion=<p>Varieties 6 (6 in the flora).</p><!--
--><p><i>Crataegus pruinosa</i> extends from Arkansas to Wisconsin, through the southern Great Lakes to southern New England, and, in the south, mainly in the Appalachians to northern Georgia.</p><!--
--><p>In the north of its range, <i>Crataegus pruinosa</i> is mainly a shrub of open successional habitats but in the south may commonly be a taller tree of open or thin woodlands.</p><!--
--><p>Many hawthorns have a little waxy bloom on their pomes; it is particularly prominent on <i>Crataegus pruinosa</i> and <i>C. cognata</i> compared to others. Some authors include in <i>C. pruinosa</i> their white-anthered counterparts, here assigned to <i>C. cognata</i>. Whereas <i>C. pruinosa</i> characteristically has entire or subentire sepal margins, some forms in the southwest of the range of the species (for example, C. calliantha Sargent, C. seducta Sargent) may have glandular-serrate sepal margins. They may represent introgression with <i>C. coccinioides</i>. The varieties of <i>C. pruinosa</i> are weakly differentiated from each other, most of them on leaf shape and size characters. The more widespread varieties constitute a range of morphotypes held together by common traits. <i>Crataegus</i> gaudens Sargent is a strikingly distinct form from Pennsylvania that has more or less elliptic leaves with lobes absent; it is clearly related to <i>C. pruinosa</i>. Note that 159. <i>Crataegus ×coleae</i>, a Michigan endemic, will key out here if its laterally scarred pyrenes are missed.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Stamens 10.
|[[Crataegus pruinosa var. dissona|Crataegus pruinosa var. dissona]]
|-id=key-0-1
|1
|Stamens 20
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaf surfaces sparsely short-hairy adaxially young, usually glabrescent; inflorescence branches sometimes sparsely villous.
|[[Crataegus pruinosa var. virella|Crataegus pruinosa var. virella]]
|-id=key-0-2
|2
|Leaf surfaces glabrous adaxially young, sometimes sparsely appressed-hairy along veins; inflorescence branches glabrous
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf blades 5–7 cm, ovate to ovate-deltate, lobes 0 or 1–4 per side, obscure, lobe apices ± obtuse, bases broadly cuneate to subtruncate; anthers cream.
|[[Crataegus pruinosa var. magnifolia|Crataegus pruinosa var. magnifolia]]
|-id=key-0-3
|3
|Leaf blades 2–7 cm, ovate or ovate-oblong to ± deltate or broadly rhombic, lobes 2–4 per side, distinct, lobe apices acute, bases broadly cuneate to subtruncate or truncate to weakly subcordate; anthers pale pink
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Leaf blades 3–7 cm, broadly ovate to deltate, length/width = 1–1.2, bases very broadly cuneate or truncate to weakly subcordate.
|[[Crataegus pruinosa var. rugosa|Crataegus pruinosa var. rugosa]]
|-id=key-0-4
|4
|Leaf blades 2–6 cm, broadly rhombic, ovate, or ovate-oblong to narrowly deltate, length/width = 1.5, bases broadly cuneate to subtruncate
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Leaf blades ovate or ovate-oblong to narrowly deltate, 4–6 cm, bases broadly cuneate to subtruncate.
|[[Crataegus pruinosa var. pruinosa|Crataegus pruinosa var. pruinosa]]
|-id=key-0-5
|5
|Leaf blades broadly rhombic, 2–4 cm, bases broadly cuneate.
|[[Crataegus pruinosa var. parvula|Crataegus pruinosa var. parvula]]
|}
</div></div><!--

-->{{#Taxon:
name=Crataegus pruinosa
|authority=(H. L. Wendland) K. Koch
|rank=species
|parent rank=series
|synonyms=
|basionyms=Mespilus pruinosa
|family=Rosaceae
|distribution=Ont.;Que.;Ark.;Conn.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Mass.;Mich.;Mo.;N.C.;N.H.;N.J.;N.Y.;Ohio;Pa.;Tenn.;Va.;Vt.;W.Va.;Wis.
|reference=None
|publication title=Hort. Dendrol.,
|publication year=1853
|special status=Endemic;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_977.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Gillenieae
|genus=Crataegus
|section=Crataegus sect. Coccineae
|series=Crataegus (sect. Coccineae) ser. Pruinosae
|species=Crataegus pruinosa
}}<!--

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