Jepson eFlora: Taxon page
Vascular Plants of California
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Aeonium haworthii

Higher Taxonomy
Family: CrassulaceaeView DescriptionDichotomous Key
Habit: Annual to shrub [(+- tree-like or climbing)], fleshy. Leaf: generally simple, alternate or opposite, in dense to open, basal (or terminal) rosettes or basal and cauline, not in rosettes, reduced distally or not, margin often +- red. Inflorescence: generally cyme, generally bracted. Flower: generally bisexual; sepals generally 3--5, generally +- free; petals generally 3--5, +- free or fused; stamens >> to = sepals, epipetalous or not; pistils generally 3--5, simple, fused at base or not, ovary 1-chambered, placenta 1, parietal, ovules 1--many, style 1. Fruit: follicles, generally 3--5. Seed: 1--many, small.
Genera In Family: +- 33 genera, +- 1400 species: +- worldwide, especially dry temperate; many cultivated for ornamental. Note: Water-stressed plants often +- brown or +- red. Consistent terminology regarding leaves, bracts difficult; in taxa with rosettes (e.g., Aeonium, Dudleya, some Sedum), structures in rosettes are leaves, those on peduncles are bracts, and those subtending flowers are flower bracts; in taxa where inflorescence is terminal, rosette leaves may "become" bracts as stem rapidly elongates to form inflorescence. Seed numbers given per follicle.
eFlora Treatment Author: Steve Boyd, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: AeoniumView DescriptionDichotomous Key

Habit: [Perennial herb] to shrub. Leaf: rosettes near stem tips, leaves alternate, generally obovate to oblanceolate, ciliate [or not]. Inflorescence: terminal; branches many, flowers on 1 side. Flower: erect, calyx, corolla not circumscissile in fruit; sepals [6]7--11[16], +- fused basally; petals = sepals in number, +- free, > sepals, cream or bright yellow; stamens 2 × sepals in number; pistils erect, +- free. Seed: many, 0.4--0.6 mm, ellipsoid, striate, brown.
Species In Genus: 31 species: Africa, Yemen, Madeira, Cape Verde, especially Canary Islands. Etymology: (Latin: name given to Aeonium arboreum by Dioscorides, Greek botanist)
eFlora Treatment Author: Steve Boyd
Unabridged Reference: Liu 1989 Special Pub Natl Mus Nat Sci Taiwan 3
Aeonium haworthii Webb & Berthel.
Habit: [Sub]shrub +- 7 dm, densely hemispheric. Stem: 3--10 mm diam. Leaf: rosettes generally open, < 10 cm diam, leaves 3--6 cm, 2--5 mm thick, obovate. Inflorescence: open, flat-topped to hemispheric. Flower: +- 1 cm wide; sepals 3--4 mm, 1.5--2 mm wide; petals lanceolate, 7--9 mm, 1.2--1.8 mm wide. Chromosomes: 2n=72.
Ecology: Sea cliffs, dunes, or persisting from cultivation; Elevation: < 100 m. Bioregional Distribution: c&s SCo; Distribution Outside California: native to Canary Islands. Flowering Time: Apr--Jul
Jepson eFlora Author: Steve Boyd
Unabridged Reference: Liu 1989 Special Pub Natl Mus Nat Sci Taiwan 3
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Citation for this treatment: Steve Boyd 2012, Aeonium haworthii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on August 21, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on August 21, 2019.

No expert verified images found for Aeonium haworthii.

Geographic subdivisions for Aeonium haworthii:
c&s SCo
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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 occurence).


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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
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.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.