View source for Platanthera obtusata

{{Treatment/ID
|accepted_name=Platanthera obtusata
|accepted_authority=(Banks ex Pursh) Lindley
|publications={{Treatment/Publication
|title=Gen. Sp. Orchid. Pl.,
|place=284. 1835
|year=1835
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Orchis obtusata
|authority=Banks ex Pursh
|rank=species
|publication_title=Fl. Amer. Sept.
|publication_place=2: 588. 1814
}}
|synonyms={{Treatment/ID/Synonym
|name=Habenaria obtusata
|authority=(Banks ex Pursh) Richardson
|rank=species
}} {{Treatment/ID/Synonym
|name=Habenaria obtusata var. collectanea
|authority=Fernald
|rank=variety
}}
|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Orchideae;Orchidaceae (tribe Orchideae) subtribe Orchidinae;Platanthera;Platanthera obtusata
|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 obtusata]]</div></div>
|volume=Volume 26
|mention_page=page 551, 553
|treatment_page=page 556
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>5.5–35 cm. <b>Leaves</b> 1(–2, rarely), spreading-ascending on base of stem; bracts 0(–1, rarely); blade linear-oblanceolate, elliptic, or broadly obovate, 3.5–15 × 0.8–5 cm. <b>Spikes</b> lax. <b>Flowers</b> resupinate, not showy, greenish white to yellowish green; corolla commonly whiter than calyx; lateral sepals reflexed; petals rhombic, lanceolate-falcate, margins entire; lip descending, linear, narrowly lance-rhombic, or linear-hastate, with median basal thickening, unlobed, 2.5–8(–10) × less than 1–2 mm, margins entire; spur slenderly conic, 3–8(–10) mm; rostellum lobes directed forward, wide-spreading, rounded-angular; pollinaria straight; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary rather slender to stout, mostly 3–10 mm. <b>2n</b> = 42, 63 (American, as <i>Habenaria</i> obtusata), 126 (Eurasian, as <i>Habenaria</i> obtusata).</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Mesic to wet coniferous forest, forested fens, sphagnum bogs, stream banks, tundra, moist roadsides
|elevation=0–3500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Colo.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;N.H.;N.Y.;Oreg.;Utah;Vt.;Wash.;Wis.;Wyo.;Eurasia [Platanthera obtusata subsp. oligantha].
|discussion=<p>The rare Eurasian <i>Platanthera obtusata</i> subsp. oligantha (Turczaninow) Hultén differs from the North American subsp. obtusata in its smaller dimensions and rhombic-lanceolate lip. It is also said to be densely few-flowered, although some Siberian material is comparable to American plants. Supposedly intermediate plants are reported from Alaska, and much material from that area is reduced in stature and with smaller flowers than typical of American plants. In most cases, however, lips are relatively slender, and the plants seem merely to be stunted by their environment. One or two collections from the Alaskan Peninsula and Aleutians, however, seem entirely referable to subsp. oligantha with dense, few-flowered inflorescences of very small flowers with rhombic-lanceolate lips and shorter curved spurs. Eurasian plants are reported to be hexaploid or perhaps sometimes triploid, and if the apparent ploidy differences delimit the taxa, then it should be possible to unequivocally identify Alaskan plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Platanthera obtusata
|authority=(Banks ex Pursh) Lindley
|rank=species
|parent rank=genus
|synonyms=Habenaria obtusata;Habenaria obtusata var. collectanea
|basionyms=Orchis obtusata
|family=Orchidaceae
|phenology=Flowering Jun–Aug.
|habitat=Mesic to wet coniferous forest, forested fens, sphagnum bogs, stream banks, tundra, moist roadsides
|elevation=0–3500 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Colo.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;N.H.;N.Y.;Oreg.;Utah;Vt.;Wash.;Wis.;Wyo.;Eurasia [Platanthera obtusata subsp. oligantha].
|reference=None
|publication title=Gen. Sp. Orchid. Pl.,
|publication year=1835
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V26/V26_1130.xml
|subfamily=Orchidaceae subfam. Orchidoideae
|tribe=Orchidaceae tribe Orchideae
|subtribe=Orchidaceae (tribe Orchideae) subtribe Orchidinae
|genus=Platanthera
|species=Platanthera obtusata
}}<!--

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