View source for Geraea ← Geraea You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Geraea |accepted_authority=Torrey & A. Gray |publications={{Treatment/Publication |title=Proc. Amer. Acad. Arts |place=1: 48. 1847 |year=1847 }} |common_names=Desert-sunflower |basionyms= |synonyms= |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ecliptinae;Geraea |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Ecliptinae]]</div><div class="higher-taxon"><small>genus</small>[[Geraea]]</div></div> |etymology=Greek geraios, old, alluding to white-haired involucre of Geraea canescens |volume=Volume 21 |mention_page=page 65, 66, 119 |treatment_page=page 122 }}<!-- --><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration;whole-organism some measurement;whole-organism duration"><b>Annuals </b>or perennials, 10–100 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem architecture"><b>Stems </b>erect, branched (branches ascending).</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Leaves </b>basal and cauline;</span> <span class="statement" id="st-d0_s3" data-properties="">alternate;</span> <span class="statement" id="st-d0_s4" data-properties="leaf position;leaf position;leaf arrangement;leaf architecture;leaf architecture">sessile or petiolate;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;base shape;base shape;margin shape;margin shape;face pubescence">blades (3-nerved) elliptic, lanceolate, oblanceolate, oblong, or ovate, bases auriculate or tapering, margins entire or toothed, faces ± canescent or glandular-puberulent to stipitate-glandular.</span> <span class="statement" id="st-d0_s6" data-properties="head architecture;head architecture;head arrangement;head arrangement;array architecture;array architecture"><b>Heads </b>radiate or discoid, borne singly or in open, paniculiform arrays (peduncles usually longer than involucres).</span> <span class="statement" id="st-d0_s7" data-properties="involucre shape;involucre diameter"><b>Involucres </b>hemispheric, 7–15 mm diam.</span> <span class="statement" id="st-d0_s8" data-properties="phyllary duration;phyllary quantity;series quantity"><b>Phyllaries </b>persistent, 20–30+ in 2–3+ series (distinct, narrowly lanceolate to linear or narrowly lance-oblong to lanceovate, subequal to unequal, outer shorter).</span> <span class="statement" id="st-d0_s9" data-properties="receptacle shape;receptacle architecture"><b>Receptacles </b>convex, paleate (paleae ± conduplicate, folded around and falling with cypselae).</span> <span class="statement" id="st-d0_s10" data-properties="ray-floret presence;ray-floret quantity;ray-floret architecture"><b>Ray-</b>florets 0 or 10–21, neuter;</span> <span class="statement" id="st-d0_s11" data-properties="corolla coloration">corollas yellow.</span> <span class="statement" id="st-d0_s12" data-properties="disc-floret quantity;disc-floret reproduction;disc-floret reproduction"><b>Disc-</b>florets 60–200+, bisexual, fertile;</span> <span class="statement" id="st-d0_s13" data-properties="corolla coloration;tube height or length or size;throat size;lobe quantity;lobe shape">corollas yellow, tubes shorter than gradually to abruptly expanded throats, lobes 5, triangular.</span> <span class="statement" id="st-d0_s14" data-properties="cypsela shape;cypsela shape"><b>Cypselae </b>(black) strongly compressed, narrowly cuneate (margins ± white, long-ciliate, faces ± hairy);</span> <span class="statement" id="st-d0_s15" data-properties="awn quantity;scale quantity">pappi persistent, of 2 awns or subulate scales.</span> <span class="statement" id="st-d0_s16" data-properties="pappus duration;pappus shape;x chromosome quantity">x = 18.</span><!-- -->{{Treatment/Body |distribution=sw United States;nw Mexico |discussion=<p>Species 2 (2 in the flora).</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Annuals; leaves sessile or petiolate, bases of blades tapering to wings, faces ± canescent; phyllaries narrowly lanceolate to linear, apices acute (margins shaggy-ciliate); ray florets 10–21 |[[Geraea canescens|Geraea canescens]] |-id=key-0-1 |1 |Perennials; leaves sessile, bases of blades ± auriculate, faces glandular-puberulent; phyllaries narrowly lance-oblong to lance-ovate, apices obtuse (faces densely glandular-puberulent); ray florets 0 |[[Geraea viscida|Geraea viscida]] |} </div></div><!-- -->{{#Taxon: name=Geraea |author=Curtis Clark |authority=Torrey & A. Gray |rank=genus |parent rank=subtribe |synonyms= |basionyms= |family=Asteraceae |distribution=sw United States;nw Mexico |reference=None |publication title=Proc. Amer. Acad. Arts |publication year=1847 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_298.xml |tribe=Asteraceae tribe Heliantheae |subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae |genus=Geraea |array architecture=paniculiform;open |awn quantity=2 |base shape=tapering;auriculate |blade shape=ovate;oblong;ovate;oblong;oblanceolate;lanceolate;elliptic |corolla coloration=yellow;yellow |cypsela shape=cuneate;compressed |disc-floret quantity=60;200 |disc-floret reproduction=fertile;bisexual |face pubescence=less canescent or glandular-puberulent;stipitate-glandular |head architecture=discoid;radiate |head arrangement=in open , paniculiform arrays;singly |involucre diameter=7mm;15mm |involucre shape=hemispheric |leaf architecture=petiolate;sessile |leaf arrangement=alternate |leaf position=cauline;basal |lobe quantity=5 |lobe shape=triangular |margin shape=toothed;entire |pappus duration=persistent |pappus shape=subulate |phyllary duration=persistent |phyllary quantity=20;30 |ray-floret architecture=neuter |ray-floret presence=absent |ray-floret quantity=10;21 |receptacle architecture=paleate |receptacle shape=convex |scale quantity=2 |series quantity=2;3 |stem architecture=branched |stem orientation=erect |throat size=expanded |tube height or length or size=shorter |whole-organism duration=perennial;annual |whole-organism some measurement=10cm;100cm |x chromosome quantity=18 }}<!-- -->[[Category:Treatment]][[Category:Asteraceae (tribe Heliantheae) subtribe Ecliptinae]] Templates used on this page: Template:Asteraceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Geraea.