View source for Ceanothus spinosus

{{Treatment/ID
|accepted_name=Ceanothus spinosus
|accepted_authority=Nuttall in J. Torrey and A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=1: 267. 1838
|year=1838
}}
|common_names=Green-bark ceanothus
|basionyms=
|synonyms=
|hierarchy=Rhamnaceae;Ceanothus;Ceanothus subg. Ceanothus;Ceanothus spinosus
|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. Ceanothus]]</div><div class="higher-taxon"><small>species</small>[[Ceanothus spinosus]]</div></div>
|volume=Volume 12
|mention_page=page 79
|treatment_page=page 86
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> sometimes arborescent, evergreen, 2–6 m. <b>Stems</b> erect, not rooting at nodes; branchlets green, thorn-tipped or not, round to ± angled in cross section, rigid, glabrous or sparsely puberulent. <b>Leaves</b>: not fascicled; petiole 4–7 mm; blade ± cupped, elliptic to oblong, 11–35 × 8–29 mm, base cuneate to rounded, margins entire, apex obtuse to weakly retuse, abaxial surface pale green, not glaucous, sometimes puberulent on midribs, adaxial surface green, shiny, glabrous; pinnately veined. <b>Inflorescences</b> axillary, paniclelike, 4–17 cm. <b>Flowers</b>: sepals, petals, and nectary pale blue to blue. <b>Capsules</b> 4–6 mm wide, not lobed; valves smooth, not conspicuously viscid, not or weakly crested. <b>2n</b> = 24.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jan–May.
|habitat=Rocky slopes, coastal sage scrub, chaparral.
|elevation=60–900 m.
|distribution=Calif.;Mexico (Baja California).
|discussion=<p>Like <i>Ceanothus incanus</i>, plants of <i>C. spinosus</i> are polymorphic for the presence of thorn-tipped branchlets. Putative hybrids with <i>C. thyrsiflorus</i> and <i>C. oliganthus </i>var.<i> sorediatus</i> have been reported (M. Van Rensselaer and H. McMinn 1944).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ceanothus spinosus
|author=
|authority=Nuttall in J. Torrey and A. Gray
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Rhamnaceae
|phenology=Flowering Jan–May.
|habitat=Rocky slopes, coastal sage scrub, chaparral.
|elevation=60–900 m.
|distribution=Calif.;Mexico (Baja California).
|reference=None
|publication title=Fl. N. Amer.
|publication year=1838
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V12/V12_319.xml
|genus=Ceanothus
|subgenus=Ceanothus subg. Ceanothus
|species=Ceanothus spinosus
}}<!--

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