View source for Platanthera orbiculata

{{Treatment/ID
|accepted_name=Platanthera orbiculata
|accepted_authority=(Pursh) Lindley
|publications={{Treatment/Publication
|title=Gen. Sp. Orchid. Pl.,
|place=286. 1835
|year=1835
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Orchis orbiculata
|authority=Pursh
|rank=species
|publication_title=Fl. Amer. Sept.
|publication_place=2: 588. 1814
}}
|synonyms={{Treatment/ID/Synonym
|name=Habenaria orbiculata
|authority=(Pursh) Torrey
|rank=species
}} {{Treatment/ID/Synonym
|name=Habenaria orbiculata var. lehorsii
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Habenaria orbiculata var. menziesii
|authority=(Lindley) Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Platanthera orbiculata var. lehorsii
|authority=(Fernald) Catling
|rank=variety
}}
|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Orchideae;Orchidaceae (tribe Orchideae) subtribe Orchidinae;Platanthera;Platanthera orbiculata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Orchidaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Orchidaceae subfam. Orchidoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Orchidaceae tribe Orchideae]]</div><div class="higher-taxon"><small>subtribe</small>[[Orchidaceae (tribe Orchideae) subtribe Orchidinae]]</div><div class="higher-taxon"><small>genus</small>[[Platanthera]]</div><div class="higher-taxon"><small>species</small>[[Platanthera orbiculata]]</div></div>
|volume=Volume 26
|mention_page=page 551, 553
|treatment_page=page 555
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>17–62 cm. <b>Leaves</b> 2, in subequal basal pair lying on ground; bracts (very rarely, 0–)1–6, scattered along stem; blade broadly elliptic to orbiculate or oblate, 5–21 × 3–22 cm. <b>Spikes</b> lax to dense. <b>Flowers</b> resupinate, rather showy; calyx mostly greenish white; corolla mostly white; lateral sepals reflexed to somewhat spreading; petals lanceolate-falcate, margins entire; lip descending to somewhat reflexed, linear-oblong to linear-lanceolate, without basal thickening, 7–17 × 1–2.5 mm, margins entire; spur slenderly clavate, 14–27 mm; rostellum lobes directed strongly forward, wide-spreading, angular; pollinaria nearly straight, 3–4.5(–4.8, very rarely) mm; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary slender to rather stout, mostly 10–26 mm. <b>2n</b> = 42.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug(–Sep).
|habitat=Mesic to wet coniferous and deciduous forest, fen forest
|elevation=0–1500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Alaska;Idaho;Ill.;Ind.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Ohio;Oreg.;Pa.;N.H.;N.J.;N.Y.;N.C.;S.Dak.;Tenn.;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|discussion=<p>The key will permit determination of most specimens of <i>Platanthera orbiculata</i> and <i>P. macrophylla</i>. More precise discrimination of ambiguous specimens is possible by use of the formula from A. H. Reddoch and J. M. Reddoch (1993): spur length + (2 × pollinarium length), which for <i>P. orbiculata</i> is less than 38 and for <i>P. macrophylla</i> is equal to or greater than 38.</p><!--
--><p>Considerable variation in size and shape of leaves occurs, and although to some extent regional in nature, intergradation is complete; recognition of infraspecific taxa is unwarranted. A few collections from isolated areas on the Pacific Coast of Canada are noteworthy, however. Those are small, few-flowered plants with rather narrow leaves borne alternately or suboppositely toward the base of the stem, as in some Asiatic species. They are in some respects very similar to <i>Platanthera</i> freynii Kränzlin, an Asiatic species distinguished primarily by its abruptly narrowed petals, in contrast to the generally broader, but variable, petals in North American plants. These western plants warrant further study to establish their identity and to elucidate relationships between North American and Asiatic species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Platanthera orbiculata
|authority=(Pursh) Lindley
|rank=species
|parent rank=genus
|synonyms=Habenaria orbiculata;Habenaria orbiculata var. lehorsii;Habenaria orbiculata var. menziesii;Platanthera orbiculata var. lehorsii
|basionyms=Orchis orbiculata
|family=Orchidaceae
|phenology=Flowering Jun–Aug(–Sep).
|habitat=Mesic to wet coniferous and deciduous forest, fen forest
|elevation=0–1500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Alaska;Idaho;Ill.;Ind.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Ohio;Oreg.;Pa.;N.H.;N.J.;N.Y.;N.C.;S.Dak.;Tenn.;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.
|reference=None
|publication title=Gen. Sp. Orchid. Pl.,
|publication year=1835
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V26/V26_1127.xml
|subfamily=Orchidaceae subfam. Orchidoideae
|tribe=Orchidaceae tribe Orchideae
|subtribe=Orchidaceae (tribe Orchideae) subtribe Orchidinae
|genus=Platanthera
|species=Platanthera orbiculata
}}<!--

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