View source for Circaea alpina subsp. pacifica

{{Treatment/ID
|accepted_name=Circaea alpina subsp. pacifica
|accepted_authority=(Ascherson & Magnus) P. H. Raven
|publications={{Treatment/Publication
|title=Canad. J. Bot.
|place=43: 1396. 1965
|year=1965
}}
|basionyms={{Treatment/ID/Basionym
|name=Circaea pacifica
|authority=Ascherson & Magnus
|rank=species
|publication_title=Bot. Zeitung (Berlin)
|publication_place=29: 392.  1871
}}
|synonyms={{Treatment/ID/Synonym
|name=C. alpina var. pacifica
|authority=(Ascherson & Magnus) M. E. Jones
|rank=variety
}}
|hierarchy=Onagraceae;Onagraceae subfam. Onagroideae;Onagraceae tribe Circaeeae;Circaea;Circaea alpina;Circaea alpina subsp. pacifica
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Onagraceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Onagraceae subfam. Onagroideae]]</div><div class="higher-taxon"><small>tribe</small>[[Onagraceae tribe Circaeeae]]</div><div class="higher-taxon"><small>genus</small>[[Circaea]]</div><div class="higher-taxon"><small>species</small>[[Circaea alpina]]</div><div class="higher-taxon"><small>subspecies</small>[[Circaea alpina subsp. pacifica]]</div></div>
|volume=Volume 10
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="stem texture;stem shape;stem pubescence;hair quantity;hair orientation;hair shape"><b>Stems </b>firm, terete, remaining mostly unflattened after pressing, pubescent with at least a few recurved, falcate hairs.</span> <span class="statement" id="st-d0_s1" data-properties="petiole some measurement"><b>Leaves:</b> petiole 1.5–5 cm;</span> <span class="statement" id="st-d0_s2" data-properties="blade atypical length;blade length;blade atypical width;blade width;margin shape;margin shape;margin shape;base shape;base shape;base shape;base shape;apex shape;apex shape;apex shape;apex shape">blade 3–7.5 (–11) × 2.5–5.5 (–8) cm, margins subentire to minutely denticulate, base usually rounded to subcordate, rarely cordate, apex acute to short acuminate.</span> <span class="statement" id="st-d0_s3" data-properties="inflorescence architecture or function or pubescence;inflorescence pubescence"><b>Inflorescences </b>usually densely, less often sparsely, glandular puberulent.</span> <span class="statement" id="st-d0_s4" data-properties="flower arrangement or growth form"><b>Flowers </b>clustered at apex of raceme, opening before elongation of raceme axis;</span> <span class="statement" id="st-d0_s5" data-properties="floral-tube some measurement">floral-tube 0.3–0.6 mm;</span> <span class="statement" id="st-d0_s6" data-properties="petal length">apical notch of petal 1/4–1/3 length of petal;</span> <span class="statement" id="st-d0_s7" data-properties="pedicel length;fruit life cycle;fruit length;2n chromosome quantity">pedicel and mature fruit combined length 3.5–6.5 mm. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Cool, temperate deciduous and mixed forests, forest margins, along streams.
|elevation=(0–)200–2700(–2900) m.
|distribution=Cool;temperate deciduous and mixed forests;forest margins;along streams;Alta.;B.C.;Alaska;Ariz.;Calif.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo.
|discussion=<p>Subspecies pacifica and subsp. alpina are easily separated by the stems with at least a few hairs and by the minutely denticulate to nearly entire leaf blade margins in subsp. pacifica. The stems of subsp. pacifica remain unflattened in herbarium specimens, whereas the stems of subsp. alpina are flattened and appear to be very narrowly winged after pressing. Subspecies pacifica is usually larger and more robust than subsp. alpina and is similar to some of the Asian subspecies of Circaea alpina in its somewhat thicker, deeper green leaves and less delicate stems. Plants in the areas where the two subspecies are sympatric are sometimes difficult to assign to one subspecies or the other, the few minute hairs on the stem being the most reliable distinguishing feature.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Circaea alpina subsp. pacifica
|authority=(Ascherson & Magnus) P. H. Raven
|rank=subspecies
|parent rank=species
|synonyms=C. alpina var. pacifica
|basionyms=Circaea pacifica
|family=Onagraceae
|phenology=Flowering summer.
|habitat=Cool, temperate deciduous and mixed forests, forest margins, along streams.
|elevation=(0–)200–2700(–2900) m.
|distribution=Cool;temperate deciduous and mixed forests;forest margins;along streams;Alta.;B.C.;Alaska;Ariz.;Calif.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo.
|reference=None
|publication title=Canad. J. Bot.
|publication year=1965
|special status=
|source xml=
|subfamily=Onagraceae subfam. Onagroideae
|tribe=Onagraceae tribe Circaeeae
|genus=Circaea
|species=Circaea alpina
|subspecies=Circaea alpina subsp. pacifica
|2n chromosome quantity=22
|apex shape=acute;short acuminate
|base shape=cordate;usually rounded;subcordate
|blade atypical length=7.5cm;11cm
|blade atypical width=5.5cm;8cm
|blade length=3cm;7.5cm
|blade width=2.5cm;5.5cm
|floral-tube some measurement=0.3mm;0.6mm
|flower arrangement or growth form=clustered
|fruit length=3.5mm;6.5mm
|fruit life cycle=mature
|hair orientation=recurved
|hair quantity=few
|hair shape=falcate
|inflorescence architecture or function or pubescence=glandular
|inflorescence pubescence=puberulent
|margin shape=subentire;minutely denticulate
|pedicel length=3.5mm;6.5mm
|petal length=1/4 length of petal;1/3 length of petal
|petiole some measurement=1.5cm;5cm
|stem pubescence=pubescent
|stem shape=terete
|stem texture=firm
}}<!--

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