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Vascular Plants of California
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Anemone occidentalis

Higher Taxonomy
Family: RanunculaceaeView DescriptionDichotomous Key
Habit: Annual, perennial herb, woody vine [shrub], occasionally aquatic. Leaf: generally basal and cauline, alternate or opposite, simple or compound; petioles at base generally flat, occasionally sheathing or stipule-like. Inflorescence: cyme, raceme, panicle, or flowers 1. Flower: generally bisexual, generally radial; sepals 3--6(20), free, early-deciduous or withering in fruit, generally green; petals 0--many, generally free; stamens generally 5--many, staminodes generally 0; pistils 1--many, ovary superior, chamber 1, style 0--1, generally +- persistent as beak, ovules 1--many. Fruit: achene, follicle, berry, +- utricle in Trautvetteria, in aggregate or not, 1--many-seeded.
Genera In Family: +- 60 genera, 1700 species: worldwide, especially northern temperate, tropical mountains; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Helleborus, Nigella). Toxicity: some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus). Note: Taxa of Isopyrum in TJM (1993) moved to Enemion; Kumlienia moved to Ranunculus.
eFlora Treatment Author: Margriet Wetherwax & Dieter H. Wilken, family description, key to genera
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: AnemoneView DescriptionDichotomous Key

Common Name: ANEMONE
Habit: Perennial herb from caudex, rhizome, or tuber. Leaf: basal, generally many, simple to compound, generally petioled; blade or leaflets lobed to dissected or not, margins entire or toothed; in flower or fruit withered or not. Inflorescence: terminal, flowers 1 or 2--7[9] in cymes; peduncle erect; pedicel elongated in fruit; involucre bracts sessile or stalked, generally in 1--2 whorls of 2--5[9], simple to compound, +- like leaves or leaflets in size, shape. Flower: receptacle elongated in fruit; sepals 5--10[27], petal-like; petals generally 0; stamens 10--200; pistils many, styles persistent as beaks. Fruit: achene.
Etymology: (Greek: flower shaken by wind) Note: Species with long, plumose styles sometimes placed in Pulsatilla.
eFlora Treatment Author: Scott Simono
Reference: Dutton et al. 1997 FNANM 3:139--155
Unabridged Reference: Hoot et al. 1994 Syst Bot 19:169--200
Anemone occidentalis S. Watson
Habit: Plant 10--60(75) cm; caudex branches 0--few. Leaf: (2)3--6(8); petiole 6--8(12) cm; blade generally 1-ternate, 1--2-pinnately lobed to dissected, soft-shaggy-hairy; terminal leaflet (2.5)3--6(8) cm, ovate; ultimate segments 2--3 mm wide, linear. Inflorescence: flowers generally 1; peduncle woolly to shaggy-hairy or +- glabrous; involucre bracts in 1 whorl of generally 3. Flower: sepals 5--7, 15--30 mm, 10--17(19) mm wide, ovate to obovate (elliptic), white to +- purple, abaxially soft-hairy; stamens 150--200. Fruit: body 3--4 mm, ellipsoid, densely woolly to soft-hairy; pedicel 15--20(22) cm; beak (18)20--40(50) mm, curved to reflexed, long-shaggy-hairy, plumose; aggregate spheric (cylindric). Chromosomes: 2n=16.
Ecology: Open, rocky slopes, alpine; Elevation: 1200--3200 m. Bioregional Distribution: KR, CaR, SN; Distribution Outside California: to British Columbia, Montana. Flowering Time: May--Sep
Jepson eFlora Author: Scott Simono
Reference: Dutton et al. 1997 FNANM 3:139--155
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Anemone occidentalis

botanical illustration including Anemone occidentalis


Citation for this treatment: Scott Simono 2012, Anemone occidentalis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 04, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on February 04, 2023.

Anemone occidentalis
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© 2010 Keir Morse
Anemone occidentalis
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© 2009 Barry Breckling
Anemone occidentalis
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© 2009 George W. Hartwell
Anemone occidentalis
click for enlargement
© 2010 Keir Morse
Anemone occidentalis
click for enlargement
© 2010 Keir Morse
Anemone occidentalis
click for enlargement
© 2009 Barry Breckling

More photos of Anemone occidentalis in CalPhotos

Geographic subdivisions for Anemone occidentalis:
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
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 (fruiting time in some monocot genera).