View source for Crataegus rubribracteolata

{{Treatment/ID
|accepted_name=Crataegus rubribracteolata
|accepted_authority=J. B. Phipps & O’Kennon
|publications={{Treatment/Publication
|title=J. Bot. Res. Inst. Texas
|place=1: 1073, plates 6.1c, 7.3c, fig. 20. 2007
|year=2007
}}
|common_names=Red bracteole hawthorn
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Gillenieae;Crataegus;Crataegus sect. Macracanthae;Crataegus (sect. Macracanthae) ser. Macracanthae;Crataegus rubribracteolata
|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. Macracanthae]]</div><div class="higher-taxon"><small>series</small>[[Crataegus (sect. Macracanthae) ser. Macracanthae]]</div><div class="higher-taxon"><small>species</small>[[Crataegus rubribracteolata]]</div></div>
|volume=Volume 9
|mention_page=page 516, 517, 521, 596
|treatment_page=page 520
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> erect, multi-stemmed in open, wide branching in shade, 20–30 dm. <b>Stems</b>: expanding bud-scales bright rufous-red; twigs: new growth color not recorded, appressed-pubescent, 1-year old mid brown, 2-years old dark red-brown, older gray or dark gray; thorns on twigs usually numerous, straight to slightly curved, 1-year old dark blackish brown, ± stout, 3.5–5.5 cm. <b>Leaves</b>: petiole length 30–35% blade, densely pubescent in adaxial sulcus, ± sessile-glandular; blade ± ovate to ovate-trullate, 4–7 cm, ± thin, base cuneate to broadly cuneate, lobes (4 or)5 or 6 per side, sinuses moderately deep, max LII 25–33%, lobe apex acute to acuminate, margins with regular, acute teeth, often subacute mature, veins (5 or)6 or 7 per side, apex acute to acuminate, abaxial surface glabrous except for sparse hairs along midvein proximally, adaxial ± densely scabrous-pubescent young (variably persistent to maturity). <b>Inflorescences</b> (6–)8–12-flowered; branches ± tomentose; bracteoles abundant, deep orange-red or fading, narrow, margins densely sessile-glandular. <b>Flowers</b> 12–15 mm diam.; hypanthium ± tomentose or densely pubescent; sepals greenish or pale green, triangular, 3–5 mm, margins glandular-denticulate, apex ± red or paler red, abaxially glabrous, adaxially pubescent; stamens 10, anthers ivory or cream; styles 3 or 4. <b>Pomes</b> 3–10 in ± compact infructescences, red young, bright red or orange-scarlet in shade mature, ± ellipsoid to suborbicular, 9–13 mm tall, densely to sometimes sparsely pubescent; sepals appressed, 3–5 mm; pyrenes 3 or 4(or 5), sides ± deeply concave.</span><!--

-->{{Treatment/Body
|phenology=Flowering late May; fruiting late Aug–Sep.
|habitat=Thickets, sometimes under aspen
|elevation=700–1100 m
|distribution=Alta.;Sask.
|discussion=<p><i>Crataegus rubribracteolata</i> is restricted to the Cypress Hills and is common in suitable habitats. The record from Montana (Bear’s Paw Mountains, Hill County) is now considered dubious.</p><!--
--><p><i>Crataegus rubribracteolata</i> can be recognized by its upright habit when grown in full light. Surprisingly, it is most easily confused with <i>C. ursopedensis</i> (see key characters), not with <i>C. sheridana</i>. To <i>C. ursopedensis</i>, C. rubrobracteolata is similar in leaf shape, inflorescence, and indumentum; the mature leaves of <i>C. rubribracteolata</i> average smaller, except in some shade forms; both inflorescence form and indumentum are denser. It lacks the strikingly flabellate young leaves of <i>C. ursopedensis</i>, flowers significantly earlier, has smaller flowers, as well as different colored bracteoles. The two species are easily confused when these characteristics are not available; in fruit, the technical characteristics of pyrene and sepal orientation need careful observation.</p>
|tables=
|references=
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-->{{#Taxon:
name=Crataegus rubribracteolata
|authority=J. B. Phipps & O’Kennon
|rank=species
|parent rank=series
|synonyms=
|basionyms=
|family=Rosaceae
|phenology=Flowering late May; fruiting late Aug–Sep.
|habitat=Thickets, sometimes under aspen
|elevation=700–1100 m
|distribution=Alta.;Sask.
|reference=None
|publication title=J. Bot. Res. Inst. Texas
|publication year=2007
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V9/V9_880.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Gillenieae
|genus=Crataegus
|section=Crataegus sect. Macracanthae
|series=Crataegus (sect. Macracanthae) ser. Macracanthae
|species=Crataegus rubribracteolata
}}<!--

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