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Cyclospermum leptophyllum

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: CyclospermumView Description 

Habit: Annual, taprooted, glabrous. Stem: decumbent to erect, generally loosely branched. Leaf: sessile or petioled; blade oblong to triangular-ovate, pinnately or ternate-pinnately dissected or compound, segments or leaflets generally thread-like to linear. Inflorescence: umbels compound or some simple; bracts, bractlets 0; rays few; rays, pedicels spreading. Flower: calyx lobes 0; petals oblong, white, tips not incurved. Fruit: elliptic to narrowly ovate, compressed side-to-side, glabrous [hairy]; ribs +- equal, thread-like to prominent and corky; oil tube 1 per rib-interval; fruit axis shallowly notched. Seed: face flat.
Species In Genus: 3 species: South America, 1 +- worldwide aggressive weed. Etymology: (Greek: circular seed) Note: "Ciclospermum" in TJM (1993).

Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson
Habit: Plant 0.5--6 dm. Leaf: 3.5--10 cm; petiole 2.5--12 mm, generally 0 on cauline leaves, sheath margin scarious; segments 3--15 mm, thread-like to linear, entire. Inflorescence: < 2 cm, generally some sessile; rays 1--3; pedicels 6--20, 2--16 mm, spreading. Fruit: 1.2--3 mm wide, elliptic to ovate. Chromosomes: 2n=14.
Ecology: Roadsides; Elevation: < 350 m. Bioregional Distribution: NCoRO, GV, c CCo, SnFrB, SCoRO, SCo; Distribution Outside California: +- worldwide, warm temperate. Flowering Time: Apr--Aug
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
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botanical illustration including Cyclospermum leptophyllum


Citation for this treatment: Lincoln Constance & Margriet Wetherwax 2017. Cyclospermum leptophyllum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 17, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 17, 2017.

Cyclospermum leptophyllum
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© 2011 Steve Matson
Cyclospermum leptophyllum
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© 2011 Steve Matson
Cyclospermum leptophyllum
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© 2014 Neal Kramer
Cyclospermum leptophyllum
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© 2014 Keir Morse
Cyclospermum leptophyllum
click for enlargement
© 2014 Keir Morse
Cyclospermum leptophyllum
click for enlargement
© 2014 Keir Morse

More photos of Cyclospermum leptophyllum in CalPhotos

Geographic subdivisions for Cyclospermum leptophyllum:
NCoRO, GV, c CCo, SnFrB, SCoRO, SCo;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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).

View elevation by latitude chart
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.