Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Dieter H. Wilken, except as specified

Annual, perennial herb, sometimes aquatic
Leaves generally basal and cauline, generally alternate, simple or compound; petioles at base generally flat, sometimes sheathing or stipule-like
Inflorescence: cyme, raceme, panicle, or flowers solitary
Flower generally bisexual, radial; sepals generally 5, free, early deciduous or withering in fruit, generally green; petals 0–many, free; stamens generally 10–many; pistils 1–many, ovary superior, chamber 1, style 1, generally ± persistent in fruit as beak, ovules 1–many
Fruit: achene, follicle, berry, or utricle-like, 1–many-seeded
Genera in family: ± 60 genera, 1700 species: worldwide, especially n temp, tropical mtns; many ornamental (Adonis, Aquilegia, Clematis, Consolida, Delphinium, Erianthis, Helleborus ), some highly TOXIC (Aconitum, Actaea, Delphinium, Ranunculus )
Reference: [Duncan & Keener 1991 Phytologia 70:24–27]


Annual, perennial herb, generally from taproot
Stems 1–few, erect, branched to not
Leaves 2–many-pinnately dissected, cauline; segments generally linear
Inflorescence: raceme or flowers solitary, terminal or axillary
Flower radial; sepals 5, generally ± greenish; petals 5–20, white to yellow or orange; pistils many
Fruit: achene, rough to wrinkled or ridged, beaked
Species in genus: ± 20 species: temp Eurasia; some cultivated as ornamental
Etymology: (Greek: Adonis of mythology, from whose blood the plant allegedly grew)


A. aestivalis L.

Annual 3–7 dm, glabrous
Leaves generally 2–3-pinnately dissected, 2–7 cm
Flower: receptacle in fruit 1.5–3 cm; sepals 5–8 mm, ovate to oblong; petals (6)8–10, 8–15 mm, oblong to oblanceolate, yellow to orange, bases bluish to purplish; anthers blue to purplish
Fruit 4–5 mm, 3.5–5 mm wide, with minute, lateral ridge below middle; back keeled; keel base short-toothed; beak 1–1.5 mm, straight
Ecology: Disturbed sites, fields, open pine forest
Elevation: 1200–1400 m.
Bioregional distribution: Modoc Plateau
Distribution outside California: to Washington, Idaho, also e US; native to Europe

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