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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Annual, perennial herb; sap colorless or orange. Leaf: basal or basal and cauline, 1–4-pinnate-dissected, segments narrow. Inflorescence: cyme, 1–many-flowered. Flower: receptacle funnel-shaped, tip cupped around ovary base, outer receptacle rim occasionally spreading; sepals 2, fused, shed as unit at flower; petals generally 4 (except doubled flowers), free, obovate or wedge-shaped, generally yellow to orange (white or pink), shed after flower leaving crown-like membrane (inner receptacle rim); stamens 12–many, free; carpels 2, style 0, stigma lobes 4–8, spreading, linear. Fruit: oblong, dehiscent from base. Seed: many, 1–2 mm, round to ovate, net-ridged, prominent-discontinuous-ridged, or minutely pitted, tan, brown, or black.
12 species: western North America. (J.F.G. von Eschscholtz, Russian surgeon, botanist, 1793–1831)

Key to Eschscholzia

1. Outer receptacle rim 0.5–5 mm ..... E. californica

1' Outer receptacle rim 0–0.3 mm

2. Leaves basal

3. Flower bud generally nodding; leaf 3 × ternate-divided, segments many, short-linear, condensed at end of long petiole, so leaf broom-like; petals (10)12–25 mm; seed minutely pitted, tan to ashy-gray; Desert ..... E. glyptosperma

3' Flower bud erect; leaf 2 × ternate-divided, segments fewer than many, long-linear, sparsely distributed along leaf, so leaf not broom-like; petals 7–12 mm; seed prominent-discontinuous-ridged, brown; Sierra Nevada Foothills, Great Central Valley ..... E. lobbii

2' Leaves basal and cauline

4. Receptacle tapered at base, but with parallel sides distally

5. Peduncle = basal leaves; petals yellow, 3–15 mm ..... E. rhombipetala

5' Peduncle 2 × basal leaves; petals orange or deep yellow, 15–40 mm ..... E. lemmonii

6. Bud generally erect, glabrous ..... subsp. kernensis

6' Bud nodding, generally hairy ..... subsp. lemmonii

4' Receptacle obconic

7. Flower bud generally hairy, nodding; petiole generally hairy ..... E. hypecoides

7' Flower bud glabrous, nodding or erect; petiole generally glabrous

8. Flower bud generally nodding; East of Sierra Nevada, D

9. Leaf segments widened to tip, short, tip generally obtuse, notched; leaves gray- or blue-green; seeds generally oblong to elliptic ..... E. minutiflora

9' Leaf segments not widened to tip, short or not, tip acute, ± notched or not; leaves bright- or yellow-green; seeds generally round ..... E. parishii

8' Flower bud generally erect; not East of Sierra Nevada, D

10. Flower bud long-pointed, tip generally > 1/4 bud; plant denser below than above; mainland ..... E. caespitosa

10' Flower bud blunt or short-pointed, tip < 1/4 bud; plant denser above than below; Channel Islands ..... E. ramosa


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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