View source for Dithyrea ← Dithyrea 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=Dithyrea |accepted_authority=Harvey |publications={{Treatment/Publication |title=London J. Bot. |place=4: 77, plate 5. 1845 |year=1845 }} |common_names=Spectacle-pod |basionyms= |synonyms= |hierarchy=Brassicaceae;Brassicaceae tribe Physarieae;Dithyrea |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Physarieae]]</div><div class="higher-taxon"><small>genus</small>[[Dithyrea]]</div></div> |etymology=Greek di- , two or double, and thyreos, shield, alluding to spectacle-shaped fruits |volume=Volume 7 |mention_page=page 237, 240, 571 |treatment_page=page 607 }}<!-- --><span class="statement" id="st-d0_s0" data-properties=""><b>Annuals </b>or perennials;</span> <span class="statement" id="st-d0_s1" data-properties="">(rhizomatous);</span> <span class="statement" id="st-d0_s2" data-properties="">not scapose;</span> <span class="statement" id="st-d0_s3" data-properties="whole-organism architecture;whole-organism pubescence;whole-organism duration;whole-organism architecture;whole-organism pubescence;whole-organism duration;trichome architecture;trichome arrangement or shape;trichome architecture;papilla architecture;papilla shape">densely pubescent, trichomes stalked, stellate to subdendritic, sometimes as simple clavate papillae on fruits.</span> <span class="statement" id="st-d0_s4" data-properties="stem orientation;stem orientation;stem architecture"><b>Stems </b>erect or decumbent, branched basally and distally.</span> <span class="statement" id="st-d0_s5" data-properties=""><b>Leaves </b>basal and cauline;</span> <span class="statement" id="st-d0_s6" data-properties="leaf position;leaf position;leaf architecture;leaf architecture">petiolate or subsessile;</span> <span class="statement" id="st-d0_s7" data-properties="basal leaf arrangement;basal leaf architecture;blade margin architecture or shape;blade margin shape;blade margin shape">basal rosulate, petiolate, blade margins dentate, sometimes repand, rarely pinnatifid;</span> <span class="statement" id="st-d0_s8" data-properties="cauline leaf architecture;cauline leaf architecture;cauline leaf architecture;cauline leaf architecture;cauline leaf architecture;blade margin architecture or shape;blade margin shape;blade margin shape;blade margin shape;blade margin shape">cauline petiolate, sessile, or subsessile, blade margins entire, dentate, or repand.</span> <span class="statement" id="st-d0_s9" data-properties=""><b>Racemes </b>(densely corymbose), considerably elongated or not elongated in fruit.</span> <span class="statement" id="st-d0_s10" data-properties="raceme length;raceme length;raceme arrangement;raceme fragility or size"><b>Fruiting </b>pedicels divaricate, stout, (straight, with 2 well-developed glands basally).</span> <span class="statement" id="st-d0_s11" data-properties="sepal orientation;sepal arrangement or course or shape;sepal arrangement or course or shape;sepal position;sepal architecture or shape"><b>Flowers:</b> sepals erect, linear or oblong-linear, (forming tube, connivent), lateral pair saccate basally;</span> <span class="statement" id="st-d0_s12" data-properties="flower coloration;flower coloration;flower coloration;flower coloration;flower coloration;flower shape;claw prominence">petals (erect), white, lavender, or purplish, lingulate, (longer than sepals), claw undifferentiated from blade;</span> <span class="statement" id="st-d0_s13" data-properties="flower architecture">stamens (erect), tetradynamous;</span> <span class="statement" id="st-d0_s14" data-properties="filament shape">filaments not dilated basally, (filiform);</span> <span class="statement" id="st-d0_s15" data-properties="anther shape;anther shape">anthers narrowly linear or sagittate;</span> <span class="statement" id="st-d0_s16" data-properties="nectar gland position;nectar gland shape;nectar gland position;nectar gland arrangement">nectar glands: lateral annular, median confluent with lateral;</span> <span class="statement" id="st-d0_s17" data-properties="">(gynophore to 0.5 mm).</span> <span class="statement" id="st-d0_s18" data-properties="fruits silicle architecture;fruits silicle architecture;fruits silicle architecture or arrangement;fruits silicle architecture;fruits silicle shape"><b>Fruits </b>silicles, sessile or shortly stipitate, didymous, not winged, strongly angustiseptate;</span> <span class="statement" id="st-d0_s19" data-properties="valve architecture;valve shape;valve shape;valve width;valve shape;seed texture;seed pubescence">valves 1-seeded, ovate, suborbicular, or slightly broader than long, keeled, enclosing seeds when falling off, indurated around margin, (rim raised), pubescent (with branched or clavate, simple papillae);</span> <span class="statement" id="st-d0_s20" data-properties="replum prominence">replum concealed by valve margin;</span> <span class="statement" id="st-d0_s21" data-properties="septum architecture">septum complete;</span> <span class="statement" id="st-d0_s22" data-properties="ovule quantity">ovules 2 per ovary;</span> <span class="statement" id="st-d0_s23" data-properties="style fusion">style distinct, (pubescent);</span> <span class="statement" id="st-d0_s24" data-properties="stigma architecture or shape;stigma architecture or shape">stigma capitate, entire.</span> <span class="statement" id="st-d0_s25" data-properties="seed arrangement;seed shape;seed architecture;seed shape"><b>Seeds </b>aseriate, flattened, not winged, oblong;</span> <span class="statement" id="st-d0_s26" data-properties="seed-coat coating">seed-coat (smooth), not mucilaginous when wetted;</span> <span class="statement" id="st-d0_s27" data-properties="">cotyledons accumbent.</span> <span class="statement" id="st-d0_s28" data-properties="cotyledon arrangement;x chromosome quantity">x = 10.</span><!-- -->{{Treatment/Body |distribution=sw United States;nw Mexico |discussion=<p>Species 2 (2 in the flora).</p> |tables= |references={{Treatment/Reference |id=rollins1979c |text=Rollins, R. C. 1979. Dithyrea and a related genus (Cruciferae). Publ. Bussey Inst. Harvard Univ. 1979: 3–32. }} }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Annuals; racemes elongated in fruit; fruit valves 3.5-5(-6) × 4-6(-7) mm, trichomes as simple, clavate papillae (stellate hairs absent or, rarely, restricted to fruit margins). |[[Dithyrea californica|Dithyrea californica]] |-id=key-0-1 |1 |Perennials; racemes not elongated in fruit; fruit valves 8-11 × 8-10 mm, trichomes sessile, stellate, sometimes mixed with forked or, rarely, simple ones (clavate papillae absent). |[[Dithyrea maritima|Dithyrea maritima]] |} </div></div><!-- -->{{#Taxon: name=Dithyrea |author=Ihsan A. Al-Shehbaz |authority=Harvey |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Brassicaceae |distribution=sw United States;nw Mexico |reference=rollins1979c |publication title=London J. Bot. |publication year=1845 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V7/V7_992.xml |tribe=Brassicaceae tribe Physarieae |genus=Dithyrea |anther shape=sagittate;linear |basal leaf architecture=petiolate |basal leaf arrangement=rosulate |blade margin architecture or shape=entire;dentate |blade margin shape=repand;dentate;repand;dentate;pinnatifid;repand |cauline leaf architecture=subsessile;sessile;subsessile;sessile;petiolate |claw prominence=undifferentiated |cotyledon arrangement=accumbent |filament shape=dilated |flower architecture=tetradynamous |flower coloration=purplish;lavender;purplish;lavender;white |flower shape=lingulate |fruits silicle architecture=not winged;stipitate;sessile |fruits silicle architecture or arrangement=didymous |fruits silicle shape=angustiseptate |leaf architecture=subsessile;petiolate |leaf position=cauline;basal |nectar gland arrangement=confluent |nectar gland position=median;lateral |nectar gland shape=annular |ovule quantity=2 |papilla architecture=simple |papilla shape=clavate |raceme arrangement=divaricate |raceme fragility or size=stout |raceme length=not elongated;elongated |replum prominence=concealed |seed architecture=not winged |seed arrangement=aseriate |seed pubescence=pubescent |seed shape=oblong;flattened |seed texture=indurate |seed-coat coating=mucilaginous |sepal architecture or shape=saccate |sepal arrangement or course or shape=oblong-linear;linear |sepal orientation=erect |sepal position=lateral |septum architecture=complete |stem architecture=branched |stem orientation=decumbent;erect |stigma architecture or shape=entire;capitate |style fusion=distinct |trichome architecture=subdendritic;stalked |trichome arrangement or shape=stellate |valve architecture=1-seeded |valve shape=keeled;suborbicular;ovate |valve width=slightly broader than long |whole-organism architecture=not scapose;not scapose |whole-organism duration=perennial;annual |whole-organism pubescence=pubescent;pubescent |x chromosome quantity=10 }}<!-- -->[[Category:Treatment]][[Category:Brassicaceae tribe Physarieae]] Templates used on this page: Template:Brassicaceae (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) Template:Treatment/Reference (view source) Return to Dithyrea.