View source for Streptanthus callistus

{{Treatment/ID
|accepted_name=Streptanthus callistus
|accepted_authority=J. L. Morrison
|publications={{Treatment/Publication
|title=Madroño
|place=4: 205, plate 31, figs. 1–10. 1938
|year=1938
}}
|basionyms=
|synonyms=
|hierarchy=Brassicaceae;Brassicaceae tribe Thelypodieae;Streptanthus;Streptanthus callistus
|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 callistus]]</div></div>
|volume=Volume 7
|mention_page=page 702
|treatment_page=page 707
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Annuals; (somewhat glaucous), hirsute. <b>Stems</b> unbranched or branched, (often bristly proximally), 0.2–0.9 dm. <b>Basal</b> leaves (soon withered); not rosulate; shortly petiolate; blade oblong-orbicular to obovate, 0.7–1.5 cm, margins dentate. <b>Cauline</b> leaves: blade broadly ovate to obovate, 0.8–1.7 cm × 4–13 mm (smaller distally), base amplexicaul, margins dentate. <b>Racemes</b> ebracteate, (with a terminal cluster of sterile flowers). <b>Fruiting</b> pedicels divaricate, 2–3 mm. <b>Flowers</b>: calyx narrowly campanulate; sepals green to purplish or (sterile flowers) lilac-purple, (narrowly ovate, sterile flowers linear-lanceolate), 3–5 mm, (8–13 mm in sterile flowers), keeled basally (not keeled in sterile flowers; sparsely hirsute in fertile flowers, glabrous in sterile flowers); petals purple (with darker purple veins), 8–11 mm, blade 4–6 × 2.5–3.5 mm, margins not crisped, (flaring), claw 4–5 mm, narrower than blade; stamens in 3 unequal pairs, (purple); filaments: abaxial pair (connate), 4–5 mm, lateral pair 2–3 mm, adaxial pair (connate nearly to apex), 5–6.5 mm; anthers: abaxial and lateral pairs fertile, 1.4–1.8 mm, adaxial pair sterile, 0.4–0.8 mm; gynophore 0.1–0.3 mm. <b>Fruits</b> divaricate, smooth, curved upward, slightly flattened, 1.3–2.5 cm × 2.5–3.5 mm; valves each with prominent midvein, (hispid, trichomes setiform, 0.5–0.8 mm); replum straight; ovules 46–60 per ovary; style 0.2–0.5 mm; stigma slightly 2-lobed. <b>Seeds</b> ovoid (plump), 1.2–1.5 × 0.6–0.8 mm; wing absent. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–May.
|habitat=Gravelly sedimentary scree and lag-barrens in chaparral-oak woodlands
|elevation=500-900 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Streptanthus callistus</i> is known from the Mount Hamilton Range of Santa Clara County and is considered to be the most endangered species in the genus.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Streptanthus callistus
|author=
|authority=J. L. Morrison
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Brassicaceae
|phenology=Flowering Apr–May.
|habitat=Gravelly sedimentary scree and lag-barrens in chaparral-oak woodlands
|elevation=500-900 m
|distribution=Calif.
|reference=None
|publication title=Madroño
|publication year=1938
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V7/V7_1218.xml
|tribe=Brassicaceae tribe Thelypodieae
|genus=Streptanthus
|species=Streptanthus callistus
}}<!--

-->[[Category:Treatment]][[Category:Streptanthus]]