Jepson eFlora: Taxon page
Vascular Plants of California
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Viburnum rigidum

Higher Taxonomy
Family: AdoxaceaeView DescriptionDichotomous Key
Habit: [Perennial herb], subshrub to tree; hairs often stellate or glandular. Leaf: generally opposite, simple or compound, generally toothed; stipules generally 0. Flower: generally bisexual; calyx teeth or lobes [2]5; corolla small, radial, rotate, lobes [3--4]5; stamens [4]5, epipetalous; ovary +- inferior, chambers 1 or 3--5, 1-ovuled; styles +- 0 or 3--5. Fruit: drupe.
Genera In Family: 5 genera, 200 species: especially northern temperate, also South America, southeastern Asia, tropical Africa. Note: Incl in Caprifoliaceae in TJM (1993), and possibly in future.
Unabridged Note: Incl in Caprifoliaceae in TJM (1993), and possibly in future according to the Angiosperm Phylogeny Website (, which states, in part, "The whole lot might usefully be combined in a Caprifoliaceae s.l. (see also APG 2003), since similarities between the families are considerable and differences are mostly slight."
eFlora Treatment Author: Charles D. Bell, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: ViburnumView DescriptionDichotomous Key

Habit: Shrub, slender, generally hairy, also +- glandular, especially in inflorescence, generally deciduous. Leaf: simple, entire to lobed. Inflorescence: compound cyme, umbel-like, generally terminal, rounded or +- flat-topped, generally with oblanceolate bracts, marginal flowers larger, sterile or all flowers +- alike; peduncles 1.5--4 cm; rays generally 7. Flower: ovary chambers 1 (2 abort), ovule pendent; style short, stigma lobes 3. Fruit: drupe, drupe-like. Seed: 1.
Species In Genus: +- 250 species: northern temperate, subtropics. Etymology: (Latin: for pliable branches used in binding) Note: Viburnum rigidum naturalized in SnFrB (Tilden Park); material previously identified as Viburnum edule belongs instead to Viburnum opulus.
eFlora Treatment Author: Thomas J. Rosatti & Charles D. Bell
Reference: Clement et al. 2014 Amer J Bot 101:1029--1049
Viburnum rigidum Vent.
Leaf: petiole 5--15(20) mm, without glands, with many nonglandular hairs throughout; blade 3--10 cm, ovate-lanceolate to -round, unlobed, entire. Inflorescence: 4--9 cm; all flowers +- alike, fertile. Flower: 5--9 mm diam. Fruit: 6--8 mm, subspheric, dark blue.
Ecology: Mixed forest; Elevation: +- 250 m. Bioregional Distribution: SnFrB (Tilden Park); Distribution Outside California: native to s Europe. Flowering Time: Oct Note: Distinct from Viburnum tinus L. based on chloroplast tree (Clement et al., 2014); reported in TJM (2012) as possibly naturalized in Tilden Park, based on plants in flower in October 2001 (Ertter 17810) that were said on collection label to be "lax" and "occasional" and observed by Rosatti in October 2014 to be lax, yet not in flower and in greater numbers than might be suggested by "occasional".
Jepson eFlora Author: Thomas J. Rosatti & Charles D. Bell
Reference: Clement et al. 2014 Amer J Bot 101:1029--1049
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Citation for this treatment: Thomas J. Rosatti & Charles D. Bell 2014, Viburnum rigidum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 2,, accessed on April 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on April 19, 2019.

No expert verified images found for Viburnum rigidum.

Geographic subdivisions for Viburnum rigidum:
SnFrB (Tilden Park);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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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.