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-undefined" data-properties=""><b>Annuals </b>or perennials; (rhizomatous); not scapose; densely pubescent, trichomes stalked, stellate to subdendritic, sometimes as simple clavate papillae on fruits. <b>Stems</b> erect or decumbent, branched basally and distally. <b>Leaves</b> basal and cauline; petiolate or subsessile; basal rosulate, petiolate, blade margins dentate, sometimes repand, rarely pinnatifid; cauline petiolate, sessile, or subsessile, blade margins entire, dentate, or repand. <b>Racemes</b> (densely corymbose), considerably elongated or not elongated in fruit. <b>Fruiting</b> pedicels divaricate, stout, (straight, with 2 well-developed glands basally). <b>Flowers</b>: sepals erect, linear or oblong-linear, (forming tube, connivent), lateral pair saccate basally; petals (erect), white, lavender, or purplish, lingulate, (longer than sepals), claw undifferentiated from blade; stamens (erect), tetradynamous; filaments not dilated basally, (filiform); anthers narrowly linear or sagittate; nectar glands: lateral annular, median confluent with lateral; (gynophore to 0.5 mm). <b>Fruits</b> silicles, sessile or shortly stipitate, didymous, not winged, strongly angustiseptate; 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); replum concealed by valve margin; septum complete; ovules 2 per ovary; style distinct, (pubescent); stigma capitate, entire. <b>Seeds</b> aseriate, flattened, not winged, oblong; seed coat (smooth), not mucilaginous when wetted; cotyledons accumbent. <b>x</b> = 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://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V7/V7_992.xml |tribe=Brassicaceae tribe Physarieae |genus=Dithyrea }}<!-- -->[[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.