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Vascular Plants of California
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Ranunculus eschscholtzii var. oxynotus

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: RanunculusView DescriptionDichotomous Key

Common Name: BUTTERCUP
Habit: Annual to perennial herb, occasionally from stolons or caudices, terrestrial or aquatic; roots generally fibrous. Stem: prostrate to erect. Leaf: basal, cauline, or both, alternate, generally reduced upward; petiole base flat, stipule-like or not; basal, proximal cauline petioles generally long; blades simple to dissected or compound, entire to toothed. Inflorescence: cyme, axillary or terminal, 1--few-flowered. Flower: sepals 3--5(6), generally early-deciduous, generally green to yellow or purple; petals 0--17[(150)], shiny, generally yellow, occasionally white or purple, nectaries near base, pocket-like or with flap-like scale; anthers yellow; pistils generally many. Fruit: achene, compressed or not, +- spheric, disk-like (width 3--15 × depth), or lenticular (width 1--2 × depth), beaked.
Species In Genus: +- 300 species: worldwide except lowland tropics; some ornamental. Etymology: (Latin: diminutive of Rana, frog, from wet habitats)
eFlora Treatment Author: Alan T. Whittemore
Species: Ranunculus eschscholtziiView Description 

Habit: Perennial herb 5--25 cm, erect or decumbent, not bulbous-based; roots basal, not tuberous. Leaf: segment tips rounded; distal cauline much-reduced, deeply parted or compound. Flower: receptacle glabrous or sparsely long-hairy; sepals 5, spreading, 4--8 mm, 2--6 mm wide, early-deciduous; petals 5--8, 6--13 mm, 4--13 mm wide. Fruit: body 1.4--2 mm, 1--1.6 mm wide, lenticular, wall thick, smooth, beak 0.6--1.8 mm, straight but occasionally curved in youth, lanceolate or awl-shaped.

Unabridged Note: 2 other varieties, not in California.
Ranunculus eschscholtzii var. oxynotus (A. Gray) Jeps.
Stem: caudex 2.5--4.5 cm, persistent leaf bases many. Leaf: basal 0.5--1.5 cm, 0.8--2 cm wide, reniform, shallowly 5--9-lobed or occasionally 3-parted, lateral segment again lobed, base truncate, middle segment unlobed, ultimate segments rounded or obtuse.
Ecology: Open, rocky alpine slopes, meadows; Elevation: 2700--4300 m. Bioregional Distribution: SNH, SnBr, SnJt, Wrn, SNE (Sweetwater, White mtns); Distribution Outside California: Nevada. Flowering Time: Jul--Sep
Jepson eFlora Author: Alan T. Whittemore
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Botanical illustration including Ranunculus eschscholtzii var. oxynotus

botanical illustration including Ranunculus eschscholtzii var. oxynotus


Citation for this treatment: Alan T. Whittemore 2012, Ranunculus eschscholtzii var. oxynotus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 19, 2019.

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

Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2015 Steve Matson
Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2015 Steve Matson
Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2015 Steve Matson
Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2017 Neal Kramer
Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2015 Steve Matson
Ranunculus eschscholtzii var. oxynotus
click for enlargement
© 2016 Steve Matson

More photos of Ranunculus eschscholtzii var. oxynotus in CalPhotos

Geographic subdivisions for Ranunculus eschscholtzii var. oxynotus:
SNH, SnBr, SnJt, Wrn, SNE (Sweetwater, White mtns);
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.