View source for Dithyrea

{{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/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_992.xml
|tribe=Brassicaceae tribe Physarieae
|genus=Dithyrea
}}<!--

-->[[Category:Treatment]][[Category:Brassicaceae tribe Physarieae]]