View source for Amelanchier cusickii

{{Treatment/ID
|accepted_name=Amelanchier cusickii
|accepted_authority=Fernald
|publications={{Treatment/Publication
|title=Erythea
|place=7: 121. 1899
|year=1899
}}
|common_names=Cusick’s shadbush
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Amelanchier alnifolia var. cusickii
|authority=(Fernald) C. L. Hitchcock
|rank=variety
}} {{Treatment/ID/Synonym
|name=A. basalticola
|authority=Piper
|rank=species
}}
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Gillenieae;Amelanchier;Amelanchier cusickii
|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>[[Amelanchier]]</div><div class="higher-taxon"><small>species</small>[[Amelanchier cusickii]]</div></div>
|volume=Volume 9
|mention_page=page 649
|treatment_page=page 652
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 2–8 m. <b>Stems</b> 1–50, solitary or in colonies. <b>Leaves</b> fully unfolded; petiole (9–)12.8–19(–28) mm; blade elliptic to suborbiculate, (22–)33–46(–61) × (13–)25–32(–50) mm, base subcordate to truncate, each margin with (0 or)1–6(–11) teeth on proximal 1/2 and (2–)4 or 5(–7) teeth in distalmost cm, largest teeth 1 mm, apex usually truncate, sometimes mucronate to acute, abaxial surface glabrous or sparsely hairy by flowering, glabrous (or sparsely hairy) later, adaxial glabrous later. <b>Inflorescences</b> (4–)6–8(–10)-flowered, (17–)26–36(–47) mm. <b>Pedicels</b>: (0 or)1 or 2 subtended by a leaf, proximalmost (4–)9–14(–18) mm. <b>Flowers</b>: sepals erect to recurved after flowering, (2.6–)3.3–4.3(–5.3) mm; petals obovate to oblanceolate, (10.8–)13.3–20.1(–23.2) × (2.3–)3.3–6.3(–7.5) mm; stamens (14–)18–20(–21); styles (4 or)5, (1.7–)2.6–4(–4.8) mm; ovary apex glabrous or sparsely hairy (or with a ring of hairs at base of styles). <b>Pomes</b> bluish black, 10 mm diam. <b>2n</b> = 4x.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jul; fruiting May–Aug.
|habitat=Basaltic ledges, cliffs, and bluffs along streams, stony soil, streambeds, stream banks, copses, mountainsides, roadsides
|elevation=600–2300 m
|distribution=B.C.;Idaho;Mont.;Oreg.;Wash.
|discussion=<p><i>Amelanchier cusickii</i> has distinctively long petals. Leaves that are glabrous upon expanding and glabrous or sparsely hairy ovary apices are also useful for identification. The species flowers before <i>A. alnifolia</i>, which suggests that the two are genetically distinct. G. N. Jones (1946) noted that <i>A. alnifolia</i> and <i>A. cusickii</i> frequently grow together and that there is no evidence of hybridization; the authors have observed hybridization between <i>A. alnifolia </i>var.<i> semiintegrifolia</i> and <i>A. cusickii</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Amelanchier cusickii
|authority=Fernald
|rank=species
|parent rank=genus
|synonyms=Amelanchier alnifolia var. cusickii;A. basalticola
|basionyms=
|family=Rosaceae
|phenology=Flowering Mar–Jul; fruiting May–Aug.
|habitat=Basaltic ledges, cliffs, and bluffs along streams, stony soil, streambeds, stream banks, copses, mountainsides, roadsides
|elevation=600–2300 m
|distribution=B.C.;Idaho;Mont.;Oreg.;Wash.
|reference=None
|publication title=Erythea
|publication year=1899
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V9/V9_1121.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Gillenieae
|genus=Amelanchier
|species=Amelanchier cusickii
}}<!--

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