View source for Orobanche riparia

{{Treatment/ID
|accepted_name=Orobanche riparia
|accepted_authority=L. T. Collins
|publications={{Treatment/Publication
|title=J. Bot. Res. Inst. Texas
|place=3: 7, fig. 1A,B. 2009
|year=2009
}}
|common_names=River broomrape
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Aphyllon riparium
|authority=(L. T. Collins) A. C. Schneider
|rank=species
}} {{Treatment/ID/Synonym
|name=Myzorrhiza riparia
|authority=(L. T. Collins) Weakley
|rank=species
}}
|hierarchy=Orobanchaceae;Orobanche;Orobanche riparia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Orobanchaceae]]</div><div class="higher-taxon"><small>genus</small>[[Orobanche]]</div><div class="higher-taxon"><small>species</small>[[Orobanche riparia]]</div></div>
|volume=Volume 17
|mention_page=page 469, 470, 482
|treatment_page=page 487
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism architecture;whole_organism quantity;whole_organism architecture;whole_organism some measurement;whole_organism fragility or size;whole_organism size;whole_organism growth form;base size;specimen fragility"><b>Plants </b>simple or few to many-branched, 5–35 cm, stout, sometimes slender, base enlarged in robust specimens.</span> <span class="statement" id="st-d0_s1" data-properties="root prominence;root prominence;root size;root architecture;root architecture"><b>Roots </b>inconspicuous or conspicuous (often forming an amorphous mass), slender, branched or unbranched.</span> <span class="statement" id="st-d0_s2" data-properties="leaf quantity;leaf fixation or orientation"><b>Leaves </b>numerous, appressed;</span> <span class="statement" id="st-d0_s3" data-properties="blade shape;blade width;blade some measurement;margin architecture or shape;apex shape;apex shape;surface pubescence">blade broadly ovate to ovate-triangular, narrower distally, 6–9 mm, margins entire, apex acute or obtuse, surfaces glabrous.</span> <span class="statement" id="st-d0_s4" data-properties="inflorescence coloration;inflorescence coloration;inflorescence coloration;inflorescence coloration;inflorescence coloration;inflorescence architecture;inflorescence pubescence;inflorescence coating;raceme shape"><b>Inflorescences </b>spikelike racemes, purple, lavender, or pallid, sometimes branched, glandular-pubescent, often ± viscid;</span> <span class="statement" id="st-d0_s5" data-properties="flower quantity">flowers numerous;</span> <span class="statement" id="st-d0_s6" data-properties="bract orientation;bract shape;bract some measurement;apex shape;apex pubescence">bracts usually reflexed, lanceolate, 8–15 mm, apex acute, glandular-pubescent.</span> <span class="statement" id="st-d0_s7" data-properties="pedicel atypical some measurement;pedicel some measurement;pedicel height or length or size"><b>Pedicels </b>0–10 (–12) mm, much shorter than plant axis;</span> <span class="statement" id="st-d0_s8" data-properties="bracteole quantity">bracteoles 2.</span> <span class="statement" id="st-d0_s9" data-properties="calyx coloration or density;calyx coloration;calyx architecture or shape;calyx atypical some measurement;calyx some measurement;calyx shape;lobe quantity;lobe shape;lobe pubescence"><b>Flowers:</b> calyx purple, rarely pale lavender externally, weakly bilaterally symmetric, 7–11 (–13) mm, deeply divided into 5 lobes, lobes lanceolate-linear to linear-subulate, densely glandular-pubescent;</span> <span class="statement" id="st-d0_s10" data-properties="corolla atypical some measurement;corolla some measurement;tube coloration;tube coloration;tube coloration;tube size;tube shape;tube pubescence;vein coloration">corolla (13–) 15–22 mm, tube white, distally often tinged with purple or pink, or with dark purple veins, constricted above ovary, slightly to moderately bent forward, glandular-puberulent to pubescent;</span> <span class="statement" id="st-d0_s11" data-properties="fold prominence;fold coloration;fold pubescence">palatal folds prominent, yellow, pubescent;</span> <span class="statement" id="st-d0_s12" data-properties="lip coloration;lip coloration;vein coloration;abaxial lip orientation;abaxial lip some measurement;lobe shape;apex shape;adaxial lip orientation;adaxial lip some measurement;lobe shape;apex shape">lips internally ± purple or lavender, often with darker veins, abaxial lip erect to slightly spreading, 3–4 mm, lobes narrowly oblong-triangular, apex acute, adaxial lip erect to ± spreading, 4–6 mm, lobes triangular, apex acute;</span> <span class="statement" id="st-d0_s13" data-properties="filament pubescence;filament pubescence;anther position;anther pubescence;anther pubescence">filaments glabrous or pubescent at base, anthers included, glabrous or sparsely pubescent.</span> <span class="statement" id="st-d0_s14" data-properties="capsule shape;capsule some measurement"><b>Capsules </b>ovoid, 7–10 mm.</span> <span class="statement" id="st-d0_s15" data-properties="seed some measurement;2n chromosome quantity"><b>Seeds </b>0.3–0.5 mm. <b>2n</b> = 48.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Sep.
|habitat=Stream banks, sand bars, flood plains.
|elevation=100–1500 m.
|distribution=Colo.;D.C.;Ill.;Ind.;Kans.;Ky.;Mo.;Nebr.;N.Mex.;Ohio;Okla.;Tenn.;Tex.;Va.;W.Va.
|discussion=<p>Orobanche riparia was formerly included in O. ludoviciana (P. A. Munz 1930). The two species can be distinguished on the basis of morphology, habitat, host associations, and phenology. Orobanche riparia appears to be more closely allied to O. cooperi than O. ludoviciana. The eastern and western populations show slight differences in color intensity and degree of pubescence.</p><!--
--><p>Orobanche riparia is the only species of Orobanche that exclusively parasitizes annual hosts, including Ambrosia trifida, Dicoria canescens, and Xanthium strumarium (Asteraceae), and rarely Nicotiana tabacum (Solanaceae) (L. T. Collins et al. 2009). Its riparian distribution, entirely on sandbars, sandy banks, and silt deposits mainly of the Mississippi, Ohio, Platte, and Rio Grande rivers and tributaries, is likewise unique. Extant populations are most abundant along the Ohio and Platte rivers but are imperiled by habitat destruction along stream banks.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Orobanche riparia
|authority=L. T. Collins
|rank=species
|parent rank=genus
|synonyms=Aphyllon riparium;Myzorrhiza riparia
|basionyms=
|family=Orobanchaceae
|phenology=Flowering Aug–Sep.
|habitat=Stream banks, sand bars, flood plains.
|elevation=100–1500 m.
|distribution=Colo.;D.C.;Ill.;Ind.;Kans.;Ky.;Mo.;Nebr.;N.Mex.;Ohio;Okla.;Tenn.;Tex.;Va.;W.Va.
|reference=None
|publication title=J. Bot. Res. Inst. Texas
|publication year=2009
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V17/V17_831.xml
|genus=Orobanche
|species=Orobanche riparia
|2n chromosome quantity=48
|abaxial lip orientation=erect;slightly spreading
|abaxial lip some measurement=3mm;4mm
|adaxial lip orientation=erect;more or less spreading
|adaxial lip some measurement=4mm;6mm
|anther position=included
|anther pubescence=pubescent;glabrous
|apex pubescence=glandular-pubescent
|apex shape=acute;acute;acute;obtuse;acute
|base size=enlarged
|blade shape=broadly ovate;ovate-triangular
|blade some measurement=6mm;9mm
|blade width=narrower
|bract orientation=reflexed
|bract shape=lanceolate
|bract some measurement=8mm;15mm
|bracteole quantity=2
|calyx architecture or shape=symmetric
|calyx atypical some measurement=11mm;13mm
|calyx coloration=pale lavender
|calyx coloration or density=purple
|calyx shape=divided
|calyx some measurement=7mm;11mm
|capsule shape=ovoid
|capsule some measurement=7mm;10mm
|corolla atypical some measurement=13mm;15mm
|corolla some measurement=15mm;22mm
|filament pubescence=pubescent;glabrous
|flower quantity=numerous
|fold coloration=yellow
|fold prominence=prominent
|fold pubescence=pubescent
|inflorescence architecture=branched
|inflorescence coating=viscid
|inflorescence coloration=pallid;lavender;pallid;lavender;purple
|inflorescence pubescence=glandular-pubescent
|leaf fixation or orientation=appressed
|leaf quantity=numerous
|lip coloration=lavender;purple
|lobe pubescence=glandular-pubescent
|lobe quantity=5
|lobe shape=triangular;oblong-triangular;lanceolate-linear;linear-subulate
|margin architecture or shape=entire
|pedicel atypical some measurement=10mm;12mm
|pedicel height or length or size=much shorter
|pedicel some measurement=0mm;10mm
|raceme shape=spikelike
|root architecture=unbranched;branched
|root prominence=conspicuous;inconspicuous
|root size=slender
|seed some measurement=0.3mm;0.5mm
|specimen fragility=robust
|surface pubescence=glabrous
|tube coloration=,;tinged with purple or tinged with pink;white
|tube pubescence=glandular-puberulent;pubescent
|tube shape=bent
|tube size=constricted
|vein coloration=darker;dark purple
|whole_organism architecture=many-branched;simple
|whole_organism fragility or size=stout
|whole_organism growth form=plant
|whole_organism quantity=few
|whole_organism size=slender
|whole_organism some measurement=5cm;35cm
}}<!--

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