Jepson Herbarium
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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 |

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 n 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

Annual, 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 5–17, 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)

Annual, biennial 10–40 cm, erect or ascending, not bulbous-based; roots basal, not tuberous.
Leaf: basal, proximal cauline 1.8–5.2 cm, 1.6–4.2 cm wide, obovate to wedge-shaped, deeply lobed or dissected, leaflets oblanceolate, divided into entire or distally dentate, oblanceolate or linear segments or not, leaflet base narrowly acuminate, tip rounded, dentate or acuminate.
Flower: receptacle sparsely bristly; sepals 5, spreading, 4–7 mm, 1–2 mm wide, early- deciduous; petals 5, 5–8 mm, 2–4 mm wide.
Fruit: body 4–6.4 mm, 8–9 mm wide, disk-like, wall spiny; beak 1.6–3.8 mm, straight, lanceolate to awl-shaped.
Roadsides, fields, disturbed areas; < 1000 m. Klamath Ranges, Inner North Coast Ranges, Cascade Range, n Sierra Nevada Foothills, Sacramento Valley, Modoc Plateau;

Previous taxon: Ranunculus aquatilis var. diffusus
Next taxon: Ranunculus bonariensis var. trisepalus

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; 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 have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. 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 Manual flowering time.