Jepson eFlora
Key to families | Table of families and genera

Key to Euphorbiaceae

View taxon page for Euphorbiaceae

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

1. Inflorescence a compact, flower-like cyathium comprising an involucre of fused bracts that encloses a cluster of 1-stamened staminate flowers and 1 pistillate flower; involucre margin bearing 1–5 nectary glands, these sometimes bearing petal-like appendages ..... EUPHORBIA

1' Inflorescence not a cyathium, not flower-like; pistillate and staminate flowers generally ± separated, not enclosed in an involucre; stamens 2–many per staminate flower

2. Leaves opposite ..... MERCURIALIS

2' Leaves alternate

3. Leaf peltate, blade palmately veined and lobed, 1–5 dm; inflorescence a panicle, terminal ..... RICINUS

3' Leaf not peltate, blade pinnately veined, entire or toothed, generally << 1 dm; inflorescences various

4. Petals present ..... DITAXIS

4' Petals 0

5. Stem and leaf hairs stellate

6. Leaf margin bluntly toothed; stipules persistent; staminate inflorescence axillary ..... BERNARDIA

6' Leaf margin entire; stipules inconspicuous; staminate inflorescence terminal or axillary ..... CROTON

5' Stem and leaf hairs 0 or unbranched

7. Bracts subtending pistillate flowers leaf-like, toothed, > fruit ..... ACALYPHA

7' Bracts subtending pistillate flowers 0 or scale-like, entire, << fruit

8. Leaves with stinging, nettle-like hairs; stamens 3–6; base of pistillate bracts without glands; stem sap clear ..... TRAGIA

8' Leaves ± glabrous or glaucous; stamens 2–3; base of pistillate bracts with 2 large glands; stem sap milky or clear

9. Annual or perennial herb; stamens 2; seeds 2–3.5 mm ..... STILLINGIA

9' Tree; stamens 2–3; seeds 6–9 mm ..... TRIADICA


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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