View source for Spiranthes diluvialis

{{Treatment/ID
|accepted_name=Spiranthes diluvialis
|accepted_authority=Sheviak
|publications={{Treatment/Publication
|title=Brittonia
|place=36: 11, figs. 1C, D, 2A–C, F. 1984
|year=1984
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Spiranthes romanzoffiana var. diluvialis
|authority=(Sheviak) S. L. Welsh
|rank=variety
}}
|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Cranichideae;Orchidaceae (tribe Cranichideae) subtribe Spiranthinae;Spiranthes;Spiranthes diluvialis
|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 Cranichideae]]</div><div class="higher-taxon"><small>subtribe</small>[[Orchidaceae (tribe Cranichideae) subtribe Spiranthinae]]</div><div class="higher-taxon"><small>genus</small>[[Spiranthes]]</div><div class="higher-taxon"><small>species</small>[[Spiranthes diluvialis]]</div></div>
|volume=Volume 26
|mention_page=page 544
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism some measurement;whole_organism growth form"><b>Plants </b>20–62 cm.</span> <span class="statement" id="st-d0_s1" data-properties="root quantity;root orientation;root architecture;root diameter"><b>Roots </b>few–several, horizontal to descending, slenderly tuberous, to 1 cm diam.</span> <span class="statement" id="st-d0_s2" data-properties="leaf duration;leaf orientation;leaf length;leaf width"><b>Leaves </b>persisting through anthesis, usually restricted to base of stem, ascending, linearlanceolate, to 28 × 1.5 cm.</span> <span class="statement" id="st-d0_s3" data-properties="spike arrangement;spike quantity;flower arrangement;flower quantity"><b>Spikes </b>usually tightly spiraled, 3 flowers per cycle of spiral, rarely loosely spiraled with more than 4 flowers per cycle;</span> <span class="statement" id="st-d0_s4" data-properties="rachis pubescence;trichome architecture or shape;gland architecture">rachis sparsely (rarely densely) pubescent, some trichomes capitate, glands obviously stalked (longest trichomes 0.2–0.4 mm).</span> <span class="statement" id="st-d0_s5" data-properties="flower coloration;flower coloration;flower orientation;flower architecture"><b>Flowers </b>white or ivory, ascending, strongly gaping from near base (lip prominently diverging from sepals and petals);</span> <span class="statement" id="st-d0_s6" data-properties="sepal fusion;sepal fusion;sepal some measurement">sepals distinct or connate at base, 7.5–15 mm;</span> <span class="statement" id="st-d0_s7" data-properties="lateral sepal orientation;lateral sepal prominence;lateral sepal fixation or orientation">lateral sepals broadly spreading to loosely incurved, often raised above rest of flower or often appressed;</span> <span class="statement" id="st-d0_s8" data-properties="petal arrangement or course or shape;apex shape">petals linear, apex acuminate;</span> <span class="statement" id="st-d0_s9" data-properties="lip coloration;lip shape;lip shape;lip shape;lip shape;lip shape;lip shape;lip length;lip width;median constriction prominence;margin shape;margin architecture or shape;margin architecture or shape;distal surface pubescence">lip often yellow centrally, ovate, lanceolate, or oblong, with variably evident median constriction, occasionally subpandurate, 7–12 × 2.5–6.8 mm, margins crisped, entire, or apically dentate, distal surface mostly glabrous adaxially;</span> <span class="statement" id="st-d0_s10" data-properties="basal callus prominence">basal calli prominent;</span> <span class="statement" id="st-d0_s11" data-properties="vein quantity;branch arrangement;branch orientation">veins few to several, branches parallel to widespreading;</span> <span class="statement" id="st-d0_s12" data-properties="viscidium arrangement or course or shape">viscidia linear to linearlanceolate;</span> <span class="statement" id="st-d0_s13" data-properties="ovary some measurement">ovary mostly 4–10 mm.</span> <span class="statement" id="st-d0_s14" data-properties=""><b>Seeds </b>monoembryonic.</span> <span class="statement" id="st-d0_s15" data-properties="seed architecture;2n chromosome quantity">2n = 74.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Aug(–Sep).
|habitat=Mesic to wet riparian meadows, marshes, stream banks
|elevation=1300–1800 m
|distribution=Colo.;Idaho;Mont.;Nebr.;Nev.;Utah;Wash.;Wyo.
|discussion=<p>Of conservation concern.</p><!--
--><p>Spiranthes diluvialis is an amphiploid product of hybridization of S. romanzoffiana and S. magnicamporum. It is correspondingly somewhat variable in individual characters, but specimens can be determined through consideration of a combination of features. The position of lateral sepals commonly varies within an inflorescence, and on the same flower one is often tightly appressed while the other is widespreading and ascending. Lip venation in particular can be helpful, as most branches are parallel, but often a few are wide-spreading.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Spiranthes diluvialis
|authority=Sheviak
|rank=species
|parent rank=genus
|synonyms=Spiranthes romanzoffiana var. diluvialis
|basionyms=
|family=Orchidaceae
|phenology=Flowering Jul–Aug(–Sep).
|habitat=Mesic to wet riparian meadows, marshes, stream banks
|elevation=1300–1800 m
|distribution=Colo.;Idaho;Mont.;Nebr.;Nev.;Utah;Wash.;Wyo.
|reference=None
|publication title=Brittonia
|publication year=1984
|special status=Illustrated;Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V26/V26_1111.xml
|subfamily=Orchidaceae subfam. Orchidoideae
|tribe=Orchidaceae tribe Cranichideae
|subtribe=Orchidaceae (tribe Cranichideae) subtribe Spiranthinae
|genus=Spiranthes
|species=Spiranthes diluvialis
|2n chromosome quantity=74
|apex shape=acuminate
|basal callus prominence=prominent
|branch arrangement=parallel
|branch orientation=widespreading
|distal surface pubescence=glabrous
|flower architecture=gaping
|flower arrangement=spiraled
|flower coloration=ivory;white
|flower orientation=ascending
|gland architecture=stalked
|lateral sepal fixation or orientation=appressed
|lateral sepal orientation=broadly spreading;loosely incurved
|lateral sepal prominence=raised
|leaf duration=persisting
|leaf length=0cm;28cm
|leaf orientation=ascending
|leaf width=0cm;1.5cm
|lip coloration=yellow
|lip length=7mm;12mm
|lip shape=subpandurate;oblong;lanceolate;oblong;lanceolate;ovate
|lip width=2.5mm;6.8mm
|margin architecture or shape=dentate;entire
|margin shape=crisped
|median constriction prominence=evident
|ovary some measurement=4mm;10mm
|petal arrangement or course or shape=linear
|rachis pubescence=pubescent
|root architecture=tuberous
|root diameter=0cm;1cm
|root orientation=horizontal;descending
|root quantity=few;several
|seed architecture=monoembryonic
|sepal fusion=connate;distinct
|sepal some measurement=7.5mm;15mm
|spike arrangement=spiraled
|spike quantity=3
|trichome architecture or shape=capitate
|vein quantity=few;several
|viscidium arrangement or course or shape=linear
|whole_organism growth form=plant
|whole_organism some measurement=20cm;62cm
}}<!--

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