View source for Ceanothus sonomensis

{{Treatment/ID
|accepted_name=Ceanothus sonomensis
|accepted_authority=J. T. Howell
|publications={{Treatment/Publication
|title=Leafl. W. Bot.
|place=2: 162. 1939
|year=1939
}}
|common_names=Sonoma ceanothus
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms=
|hierarchy=Rhamnaceae;Ceanothus;Ceanothus subg. Cerastes;Ceanothus sonomensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rhamnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ceanothus]]</div><div class="higher-taxon"><small>subgenus</small>[[Ceanothus subg. Cerastes]]</div><div class="higher-taxon"><small>species</small>[[Ceanothus sonomensis]]</div></div>
|volume=Volume 12
|mention_page=page 78, 95, 102
|treatment_page=page 103
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 0.5–1 m, often moundlike. <b>Stems</b> erect to ascending, not rooting at nodes; branchlets gray to grayish brown, rigid, strigillose, glabrescent. <b>Leaves</b> not fascicled; petiole 0–1 mm; blade cupped, widely obovate to suborbiculate, 5–12 × 2–10 mm, base cuneate, margins not revolute, wavy, spinose-dentate, teeth 2–4, apex widely notched; abaxial surface pale green or grayish green and glaucous, strigillose on veins, adaxial surface shiny green, glabrous. <b>Inflorescences</b> axillary or terminal, 0.8–1.5 cm. <b>Flowers</b>: sepals, petals, and nectary blue to lavender. <b>Capsules</b> 4–5 mm wide, usually not, sometimes weakly lobed; valves smooth, horns subapical, minute to ± prominent, erect, intermediate ridges absent. <b>2n</b> = 24.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Apr.
|habitat=Sandy to rocky soils derived mostly from volcanic substrates, slopes, ridges, chaparral.
|elevation=100–700 m.
|distribution=Calif.
|discussion=<p><i>Ceanothus sonomensis</i> is distinctive in having spinose-dentate, few-toothed leaves, and slender fruit horns two to three millimeters; it occurs at a few scattered localities in the mountains of Napa and Sonoma counties.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ceanothus sonomensis
|authority=J. T. Howell
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Rhamnaceae
|phenology=Flowering Mar–Apr.
|habitat=Sandy to rocky soils derived mostly from volcanic substrates, slopes, ridges, chaparral.
|elevation=100–700 m.
|distribution=Calif.
|reference=None
|publication title=Leafl. W. Bot.
|publication year=1939
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V12/V12_844.xml
|genus=Ceanothus
|subgenus=Ceanothus subg. Cerastes
|species=Ceanothus sonomensis
}}<!--

-->[[Category:Treatment]][[Category:Ceanothus subg. Cerastes]]