Directory       News       Site Map       Home
    Jepson eFlora: Taxon page
Key to families | Table of families and genera

Previous taxon Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Previous taxon


Margriet Wetherwax & Dieter H. Wilken, family description, key to genera

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.
± 60 genera, 1700 species: worldwide, especially northern temperate, tropical mountains; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Helleborus, Nigella). some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus). [Whittemore & Parfitt 1997 FNANM 3:85–271] Taxa of Isopyrum in TJM (1993) moved to Enemion; Kumlienia moved to Ranunculus. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Ranunculaceae


Alan T. Whittemore

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.
± 300 species: worldwide except lowland tropics; some ornamental. (Latin: small frog, from wet habitats)
Unabridged etymology: (Latin: diminutive of Rana, frog, from wet habitats)

Key to Ranunculus

R. californicus Benth.
Perennial herb (11)18–70 cm, not rooting at nodes. Leaf: basal, proximal cauline widely ovate or cordate, 3-lobed or -parted to 1-ternate; distal much reduced, deeply parted or compound. Flower: receptacle glabrous (bristly); sepals 5, reflexed 2–3 mm from base, 4–8 mm, 2–4 mm wide, early-deciduous; petals 9–17, (6)7–14 mm, 2–6 mm wide. Fruit: disk-like, wall thick, smooth, beak 0.2–0.8 mm, curved, lanceolate. [Online Interchange]

R. californicus var. californicus
Stem: erect to decumbent, glabrous or spreading-hairy. Leaf: 2.8–5.8 cm, 4–6 cm wide, segments undivided or 1–2 × lobed or parted, ultimate segments oblong-elliptic to lanceolate or linear, toothed or entire, tip acute to rounded-acute. Fruit: body 1.8–3.2 mm, 1.4–2.4 mm wide.
Grassland, open woodland; < 2000 m. Northwestern California, Sierra Nevada Foothills, Great Central Valley, Central Western California, Southwestern California; to British Columbia. [Ranunculus californicus var. austromontanus L.D. Benson; Ranunculus californicus var. gratus Jeps.; Ranunculus californicus var. rugulosus (Greene) L.D. Benson] Mar–Aug [Online Interchange]

Previous taxon: Ranunculus californicus
Next taxon: Ranunculus californicus var. cuneatus


Name search

Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 24 2015
Citation for this treatment: [Author of taxon treatment] 2013. Ranunculus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 24 2015

Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.

click for enlargement Ranunculus californicus var. californicus
See CalPhotos for additional images
1995 Saint Mary's College of California

Geographic subdivisions indicated for the distribution of Ranunculus californicus var. californicus Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.