View source for Streptanthus platycarpus

{{Treatment/ID
|accepted_name=Streptanthus platycarpus
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Smithsonian Contr. Knowl.
|place=5(6): 10. 1853
|year=1853
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Erysimum platycarpum
|authority=(A. Gray) Kuntze
|rank=species
}} {{Treatment/ID/Synonym
|name=Streptanthus sparsiflorus
|authority=Rollins
|rank=species
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Thelypodieae;Streptanthus;Streptanthus platycarpus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Thelypodieae]]</div><div class="higher-taxon"><small>genus</small>[[Streptanthus]]</div><div class="higher-taxon"><small>species</small>[[Streptanthus platycarpus]]</div></div>
|volume=Volume 7
|mention_page=page 702, 703
|treatment_page=page 720
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Annuals; (glaucous), usually glabrous throughout (sometimes distalmost stems and pedicels pubescent). <b>Stems</b> (simple from base), usually branched, 1.2–10 dm, (sometimes sparsely pilose distally). <b>Basal</b> leaves (soon withered); subrosulate; petiolate; blade oblanceolate in outline, 4–20 cm, margins sinuate to lyrate or pinnatifid. <b>Cauline</b> leaves: blade ovate, 1.5–15 cm × 5–60 mm, (smaller distally), base auriculate to amplexicaul, margins entire or sinuate-dentate (entire distally). <b>Racemes</b> usually ebracteate or proximalmost flowers bracteate, rarely bracteate throughout, (lax). <b>Fruiting</b> pedicels divaricate to ascending, (straight), 7–35 mm, (glabrous or pilose). <b>Flowers</b>: calyx campanulate; sepals purple to deep maroon, (lanceolate), 8–12 mm, not keeled; petals (spreading to reflexed), lavender or purplish lavender, 16–27 mm, blade 10–18 × 6–9 mm, margins not crisped, claw 6–10 mm (crisped); stamens in 3 unequal pairs; filaments (distinct): abaxial pair 4–6 mm, lateral pair 3–5 mm, adaxial pair 5–8 mm; anthers (all) fertile, 4.5–6 mm; gynophore 0.3–1mm. <b>Fruits</b> erect to divaricate-ascending, smooth, straight, strongly flattened, 4–9.5 cm × 4.5–6 mm; valves each with prominent midvein; replum straight; ovules 26–42 per ovary; style 0.5–2 mm; stigma strongly 2-lobed. <b>Seeds</b> orbicular to oblong-orbicular, 4.5–5 × 4–5 mm; wing 0.7–1.2 mm wide, continuous. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Apr.
|habitat=Cliff ledges, often on limestone, rocky sites, roadsides, rocky creek beds
|elevation=400-1200 m
|distribution=Tex.;Mexico (Coahuila).
|discussion=<p><i>Streptanthus platycarpus</i> is known in Texas from Brewster, Crockett, Culberson, Pecos, Presidio, Terrell, and Val Verde counties.</p><!--
--><p>Although the racemes in <i>Streptanthus platycarpus</i> are usually ebracteate or have only the proximalmost 1–3 flowers bracteate, an exception is one collection (Hinckley 3780, GH) in which all flowers are bracteate.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Streptanthus platycarpus
|authority=A. Gray
|rank=species
|parent rank=genus
|synonyms=Erysimum platycarpum;Streptanthus sparsiflorus
|basionyms=
|family=Brassicaceae
|phenology=Flowering Mar–Apr.
|habitat=Cliff ledges, often on limestone, rocky sites, roadsides, rocky creek beds
|elevation=400-1200 m
|distribution=Tex.;Mexico (Coahuila).
|reference=None
|publication title=Smithsonian Contr. Knowl.
|publication year=1853
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_1254.xml
|tribe=Brassicaceae tribe Thelypodieae
|genus=Streptanthus
|species=Streptanthus platycarpus
}}<!--

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