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Ammi visnaga

Higher Taxonomy
Family: Apiaceae (Umbelliferae)View DescriptionDichotomous Key

Habit: Annual to perennial herb [shrub, tree], generally from taproot. Stem: generally +- scapose, generally ribbed, hollow. Leaf: basal and generally cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, occasionally compound. Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present in involucres or 0; bractlets generally present in "involucels". Flower: many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small; petals 5, free, generally ovate or spoon-shaped, generally incurved at tips, generally +- ephemeral; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a +- conic, persistent projection or platform at tip subtending 2 free styles. Fruit: 2 dry, 1-seeded halves (= mericarps), separating from each other but generally +- persistent to central axis; ribs on halves 5, 2 marginal, 3 to back; oil tubes 1--several per interval between ribs.
Genera In Family: 300 genera, 3000 species: +- worldwide, especially temperate; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); Bupleurum lancifolium Hornem. is historical garden weed; some toxic (e.g., Conium). Note: Mature fruit generally critical in identification, shape given in outline. Hydrocotyle moved to Araliaceae. Petroselinum crispum (Mill.) A.W. Hill is a waif.
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: AmmiView DescriptionDichotomous Key

Habit: Annual, biennial, taprooted, glabrous. Stem: erect, branched. Leaf: blade oblong to ovate, pinnately or ternately dissected, segments lanceolate to thread-like. Inflorescence: umbels compound; bracts, bractlets many, leaf-like; rays, pedicels many, spreading-ascending to incurved in fruit. Flower: calyx lobes minute; petals wide, white, tips 2-lobed. Fruit: oblong to ovate, +- cylindric, compressed side-to-side; ribs +- equal, thread-like; oil tube 1 per rib-interval; fruit axis entire or divided. Seed: face flat.
Species In Genus: +- 6 species: Eurasia, Mediterranean. Etymology: (Ancient name used by Dioscorides) Toxicity: TOXIC: rarely eaten by livestock.

Ammi visnaga (L.) Lam.
Habit: Plant 2--8 dm. Leaf: petiole +- 1 cm; blade 5--20 cm, triangular-ovate, segments 5--35 mm; cauline leaves 1- or 2-pinnately or -ternately dissected. Inflorescence: glabrous; peduncle 8--14 cm; rays 60--100, 2--5 cm, slender; pedicels 3--13 mm. Fruit: 2--2.5 mm, oblong-ovate to ovate. Chromosomes: 2n=20.
Ecology: Roadsides, railroad tracks, disturbed areas; Elevation: generally < 1000 m. Bioregional Distribution: CCo, SCo; Distribution Outside California: native to Eurasia. Flowering Time: Jun--Jul
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
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botanical illustration including Ammi visnaga


Citation for this treatment: Lincoln Constance & Margriet Wetherwax 2016. Ammi visnaga, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Ammi visnaga
click for enlargement
© 2007 Carol W. Witham
Ammi visnaga
click for enlargement
© 2007 Carol W. Witham

More photos of Ammi visnaga in CalPhotos

Geographic subdivisions for Ammi visnaga:
CCo, SCo;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.