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Ceanothus cuneatus var. cuneatus

BUCKBRUSH


Higher Taxonomy
Family: RhamnaceaeView DescriptionDichotomous Key
Common Name: BUCKTHORN FAMILY
Habit: [Perennial herb] shrub, tree, generally erect, often thorny. Leaf: simple, generally alternate, often clustered on short-shoots; stipules generally present, occasionally modified into spines; generally petioled; blade pinnate-veined or 1--5-ribbed from base. Inflorescence: cyme, panicle, umbel, or flowers 1 or clustered in axils or on short-shoots. Flower: generally bisexual, radial; hypanthium subtending, surrounding, or partly fused to ovary; sepals 4--5; petals 0, 4--5, generally clawed; stamens 0, 4--5, alternate sepals, attached to hypanthium top, each generally fitting into a petal concavity; disk (0 or) between stamens, ovary, thin to fleshy, entire or lobed, free from ovary, adherent or fused to hypanthium; ovary superior or +- inferior, chambers [1]2--4, 1--2-ovuled, style 1, stigma entire or 2--3-lobed. Fruit: capsule, drupe.
Genera In Family: 50--52 genera, 950 species: especially tropics, subtropics some cultivated (Ceanothus; Frangula; Rhamnus; Ziziphus).
eFlora Treatment Author: John O. Sawyer, Jr., except as noted
Scientific Editor: Steve Boyd, Thomas J. Rosatti.
Genus: CeanothusView DescriptionDichotomous Key

Common Name: CALIFORNIA-LILAC
Habit: Shrub, tree-like or not, generally erect or mat- to mound-like. Stem: branches generally arranged like leaves; twigs thorn-like or not, generally not angled. Leaf: alternate or opposite, some clustered on short-shoots or not, deciduous or evergreen; stipules scale-like, thin, deciduous, or knob-like, corky, thick, base persistent; blade flat or wavy, tip generally acute to obtuse, margin thick (i.e., thicker than adjacent blade) or not, rolled under or not, wavy or not, entire or gland- or sharp-toothed, glands generally dark, teeth pale, alternate blade 1--3-ribbed from base, generally thin, opposite blade 1-ribbed from base, thick, firm. Inflorescence: umbel-, raceme-, or panicle-like aggregations of few-flowered clusters, axillary or terminal; pedicels white to deep blue or pink. Flower: conspicuous, generally < 5 mm; hypanthium surrounding fleshy disk below ovary base, in fruit thick, not splitting; sepals generally 5, lance-deltate, incurved, colored like petals, persistent; petals generally 5, blade hood-like, white to deep blue or pink; stamens generally 5, opposite petals; ovary 1/2-inferior, 3-lobed, chambers 3, each 1-ovuled, styles 3. Fruit: capsule, +- spheric, generally +- 3-lobed, generally smooth, 3-ridged or not, horned or not. Seed: 3, 2--5 mm.
Etymology: (Greek: thorny pl) Note: Hybrids possibly common (named hybrids not recognized here), discussed in Fross & Wilken; possible hybrid forms do not key easily.
eFlora Treatment Author: Dylan O. Burge & Dieter H. Wilken
Reference: Fross & Wilken 2006 Ceanothus. Timber Press; Burge et al. 2015 Syst Bot 40:950--961.
Species: Ceanothus cuneatusView Description 


Habit: Plant erect (mound-like), generally open. Stem: ascending to spreading, occasionally arched, not rooting at nodes; twigs generally brown to gray-brown, generally glabrous to +- puberulent. Leaf: opposite, some clustered or not, evergreen; stipules knob-like; petiole < 3 mm, generally glabrous to +- puberulent; blade 6--30 mm, 3--18 mm wide, elliptic to +- round, dull green, adaxially glabrous, abaxially paler, glabrous to +- strigose, tip obtuse to notched, margin entire or teeth +- sharp. Inflorescence: umbel-like, generally 1--2 cm. Flower: white, pale blue, blue, or lavender. Fruit: 4--6 mm wide, +- 3-ridged distally; horns 0.5--2 mm. Chromosomes: 2n=24.

Ceanothus cuneatus (Hook.) Nutt. var. cuneatus
NATIVE
Habit: Plant < 3 m. Stem: generally ascending to spreading; twigs generally gray-brown. Leaf: some occasionally clustered; blade elliptic, oblanceolate, or obovate, tip acute to +- rounded, margin generally entire. Flower: generally white.
Ecology: Sandy to rocky flats, slopes, ridges; Elevation: < 2133 m. Bioregional Distribution: CA-FP (exc ChI), MP; Distribution Outside California: Oregon, northern Baja California. Flowering Time: Feb--May Note: Intergrades with Ceanothus cuneatus var. ramulosus in southern SCoRO, western TR. Were they to be recognized taxonomically, plants from Santa Cruz Mountains with leaf blades 15--27 mm, 9--20 mm wide, wide-elliptic to -obovate, would be assignable to Ceanothus cuneatus var. dubius J.T. Howell; study needed.
Synonyms: Ceanothus cuneatus var. dubius J.T. Howell; Ceanothus cuneatus var. submontanus (Rose) McMinn
Jepson eFlora Author: Dylan O. Burge & Dieter H. Wilken
Reference: Fross & Wilken 2006 Ceanothus. Timber Press; Burge et al. 2015 Syst Bot 40:950--961.
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Ceanothus cuneatus var. cuneatusbotanical illustration including Ceanothus cuneatus var. cuneatus


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Citation for this treatment: Dylan O. Burge & Dieter H. Wilken 2020, Ceanothus cuneatus var. cuneatus, in Jepson Flora Project (eds.) Jepson eFlora, Revision 8, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=75440, accessed on December 02, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 02, 2024.

Ceanothus cuneatus  
var. cuneatus
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©2005 Steve Matson
Ceanothus cuneatus  
var. cuneatus
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©2019 Barry Breckling
Ceanothus cuneatus  
var. cuneatus
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©2014 Neal Kramer
Ceanothus cuneatus  
var. cuneatus
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©2017 Neal Kramer
Ceanothus cuneatus  
var. cuneatus
click for image enlargement
©2008 Keir Morse

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Geographic subdivisions for Ceanothus cuneatus var. cuneatus:
CA-FP (exc ChI), MP
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map of distribution 1

(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month Flowering-Fruiting Monthly Counts

Duplicates counted once; synonyms included.
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Blue line denotes eFlora flowering time (fruiting time in some monocot genera).