Jepson eFlora
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 bilateral; sepals petal-like, not alike, uppermost spurred or hooded, generally > others

2. Uppermost sepal hooded, not spurred, enclosing petals, stamens ..... ACONITUM

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

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

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

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

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

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

5. Pistils 1; fruit a berry ..... ACTAEA

5' Pistils (1)2–many; fruit achene or follicleutricle 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, scapose; sepals 5–8, linear; petals 5–7 ..... COPTIS

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

6' Ovule 1 per ovary; fruit acheneutricle in Trautvetteria)

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

11. Plant perennial 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 axillary; sepals generally 4 ..... CLEMATIS

10' Cauline leaves alternate 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 entire, crenate, or lobed; flower unisexual or bisexual ..... THALICTRUM

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

15. Leaf crenate to palmately lobed, lobes rounded to obtuse, entire to toothed or lobed; inflorescence scapose, flowers 1(3); sepals 6–13 mm, blade ± 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 panicle; sepals 2.5–6 mm, blade cup-like; petals 0 ..... TRAUTVETTERIA


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