Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Ranunculaceae

View taxon page for Ranunculaceae


Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Flower sepals petal-like, not alike, uppermost spurred or hooded, generally > others

2. Uppermost sepal hooded, not spurred, enclosing petalsstamens ..... ACONITUM

2' Uppermost sepal spurred, ± flat or curved but not hooded, generally not enclosing petals, stamens

3. Annual, generally from taproot; petals 2, fusedpistil 1 ..... CONSOLIDA

3' Perennial herb, generally from ±  or fleshy roots; petals 4, freepistils 3(5) ..... DELPHINIUM

1' Flower ; sepals petal-like or not, ± alike

4. Sepal spurs present, petal spurs 0; plant generally tufted; leaves  ..... MYOSURUS

4' Sepal spurs 0, petal spurs occasional; plant not tufted; leaves generally basal and cauline, generally dissected or compound (or basal, simple,  to reniform)

5. Pistils 1; fruitberry ..... ACTAEA

5' Pistils (1)2–many; fruit  or follicle (±  in Trautvetteria)

6. Ovules >= 2 per ovary; fruit follicle

7. Petals spurred ..... AQUILEGIA

7' Petals 0 or not spurred

8. Leaf simple ..... CALTHA

8' Leaf compound

9. Plant from slender rhizomes or stolons; sepals 5–8, linear; petals 5–7 ..... COPTIS

9' Plant from clustered, slender to  or ± spheric fleshy roots, not scapose; sepals generally 5,  to obovate; petals 0 ..... ENEMION

6' Ovule 1 per ovary; fruit achene (± utricle in Trautvetteria)

10. Cauline leaves generally  or 0 but  bracts leaf-like, generally in 1–2 whorls of 2–5

11. Plant  herb, not vine; basal leaves present, cauline 0 but involucre bracts leaf-like, generally in 1–2 whorls of 2–5; inflorescence terminal; sepals 5–10 ..... ANEMONE

11' Plant ± woody vine; basal leaves 0, cauline generally many, opposite; inflorescence ; sepals generally 4 ..... CLEMATIS

10' Cauline leaves  or 0

12. Perianth parts in 2 whorls; sepals generally green to ± yellow, not petal-like; petals 3–many, yellow to orange, occasionally white or purple

13. Anthers ± purple; petals yellow to orange, base ± purple, nectaries 0 ..... ADONIS

13' Anthers yellow; petals generally yellow, occasionally white or purple, nectaries near base ..... RANUNCULUS

12' Perianth parts in ± 1 whorl (inner << outer, gland-like in Ranunculus hystriculus); sepals generally green to white or ± purple, petal-like or not; petals generally 0

14. Leaf compound, leaflets , or lobed; flower unisexual or  ..... THALICTRUM

14' Leaf simple, crenate to deeply lobed; flower bisexual

15. Leaf crenate to palmately lobed,  rounded to , entire to toothed or lobed; inflorescence scapose, flowers 1(3); sepals 6–13 mm,  ± flat; petals 2–4 mm, gland-like ..... Ranunculus hystriculus

15' Leaf deeply palmately lobed, lobes ± wedge-shaped, toothed distally; inflorescence not scapose, flowers >= 5 in terminal ; sepals 2.5–6 mm, blade cup-like; petals 0 ..... TRAUTVETTERIA


Please use this Google Form for Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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.