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Anthemis arvensis

Higher Taxonomy
Family: Asteraceae (Compositae)View DescriptionDichotomous Key

Habit: Annual to tree. Leaf: basal and/or cauline, alternate, opposite, rarely whorled, simple to 2+ × compound. Inflorescence: 1° inflorescence a head, resembling a flower, of several types (see below), 1--many in generally +- cyme-like cluster; each head generally with +- calyx-like involucre of 1--many series of phyllaries (involucre bracts); receptacle of head flat to conic or columnar, paleate (bearing paleae = receptacle bracts) or epaleate; flowers 1--many per head. Flower: bisexual, unisexual, or sterile, +- small, of several types (see below); calyx 0 or modified into +- persistent pappus of bristles, scales, and/or awns; corolla radial or bilateral (0), lobes generally (0)3--5; stamens 4--5, filaments generally free, generally fused to corolla at tube/throat junction, anthers generally fused into cylinder around style, anther base generally rounded or cordate (deeply sagittate or with tail-like appendages), tip (= flattened appendage) generally projecting beyond pollen sac; pistil 1, 2-carpeled, ovary inferior, 1-chambered, 1-seeded, placenta basal, style 1, tip generally +- 2-branched (except in some staminate disk flowers), branch tips truncate or generally bearing +- brush-like appendages; stigmas 2, generally on adaxial faces of style branches. Fruit: achene (also called a cypsela) (drupe in Chrysanthemoides), cylindric to ovoid, sometimes compressed, generally deciduous with pappus attached.
Genera In Family: +- 1500 genera, 23000 species: worldwide, many habitats. Note: Flower and head types differ in form and sexual condition. A disk flower has a generally radial corolla, with a cylindric tube, expanded throat, and generally 5 lobes. Disk flowers are generally bisexual and fertile but occasionally staminate with reduced ovaries. Discoid heads comprise only disk flowers. A radiant head is a variant of a discoid head, with peripheral disk flower corollas expanded, often bilateral. A ray flower corolla is bilateral, generally with a slender tube and flattened petal-like ray (single lip composed of generally 3 lobes). Ray flowers are generally pistillate or sterile (occasionally lacking styles). Radiate heads have peripheral ray flowers and central disk flowers. Disciform heads superficially resemble discoid heads, with pistillate or sterile flowers that lack rays, together with or separate from disk flowers. A ligulate flower is bisexual, with a bilateral, generally ephemeral corolla and 5-lobed ligule. Liguliflorous heads comprise only ligulate flowers. See glossary p. 31 for illustrations of family characteristics. Echinops sphaerocephalus L., Gaillardia aristata Pursh, Gaillardia pulchella Foug., Hymenothrix loomisii S.F. Blake, Tagetes erecta L., Thelesperma megapotamicum (Spreng.) Kuntze are waifs. Melampodium perfoliatum Kunth, historic urban waif. Ageratum conyzoides L., Guizotia abyssinica (L. f.) Cass., Santolina chamaecyparisus L., orth. var. are rare or uncommon escapes from cultivation. Dyssodia papposa, Ismelia carinata (Schousb.) Sch. Bip. [Chrysanthemum carinatum Schousb.], Mantisalca salmantica (L.) Briq. & Cavill. are historical or extirpated waifs in California. Inula helenium L. not documented in California. Taxa of Aster in TJM (1993) treated here in Almutaster, Eucephalus, Eurybia, Ionactis, Oreostemma, Sericocarpus, Symphyotrichum; Chamomilla in Matricaria; Bahia in Hymenothrix; Cnicus in Centaurea; Conyza in Erigeron and Laennecia; Dugaldia in Hymenoxys; Erechtites in Senecio; Hymenoclea in Ambrosia; Lembertia in Monolopia; Osteospermum ecklonis in Dimorphotheca; Picris echioides in Helminthotheca; Prionopsis in Grindelia; Raillardiopsis in Anisocarpus and Carlquistia; Schkuhria multiflora in Picradeniopsis; Trimorpha in Erigeron; Venidium in Arctotis; Whitneya in Arnica. Amauriopsis in TJM2 (2012) treated here in Hymenothrix; Arida in Leucosyris; Bahia in Picradeniopsis.
Unabridged Note: Largest family of vascular plants in California and of eudicots globally.
eFlora Treatment Author: David J. Keil, except as noted
Scientific Editor: David J. Keil, Bruce G. Baldwin.
Genus: AnthemisView DescriptionDichotomous Key

Habit: Annual, perennial herb, often aromatic; herbage strigose to long-soft-hairy or +- glabrous. Stem: 1--5+, decumbent to erect, generally branched. Leaf: most cauline, alternate, petioled or sessile, +- obovate to spoon-shaped, 1--3-pinnately divided. Inflorescence: heads radiate [discoid], 1 or in rounded to flat-topped clusters; involucre obconic to hemispheric or wider, phyllaries persistent, generally 21--35+, +- graduated in 3--5 series, free, generally lanceolate, oblong, or elliptic, margin and tip scarious, receptacle hemispheric to narrowly conic, paleate throughout or distally; paleae awl-shaped or elliptic to obovate. Ray Flower: (0)5--20+, pistillate or sterile (style present); corolla white [yellow or pink]. Disk Flower: generally 100--300+; corolla generally yellow, tube << funnel-shaped throat, swollen, lobes +- triangular; anther tip +- ovate; style tips truncate. Fruit: obovoid to obconic or top-shaped, round or 4-angled, generally 10-ribbed, smooth or tubercled, glabrous; pappus 0 or crown-like.
Species In Genus: +- 175 species: Europe, western Asia, northern Africa. Etymology: (Greek: flower) Note: Cota tinctoria (L.) Guss. [Anthemis tinctoria L. in TJM (1993)] occasional escape from cultivation.
Unabridged Note: Cota tinctoria (L.) J. Gay ex Guss. (Anthemis tinctoria L. in TJM (1993)) occasional escape from cultivation.
eFlora Treatment Author: Linda E. Watson
Reference: Watson 2006 FNANM 19:537--538

Anthemis arvensis L.
Habit: Annual (occasionally persisting), <= 3(8) dm, not notably scented. Stem: decumbent (sometimes rooting at nodes) or ascending to erect. Leaf: 15--35 mm, 8--16 mm wide, 1--2-pinnately lobed (ultimate lobes linear or narrowly elliptic to triangular). Inflorescence: involucre 6--13 mm diam. Ray Flower: 5--20. Disk Flower: corolla 2--3(4) mm. Fruit: 1.7--2+ mm; pappus 0 or a minute crown. Chromosomes: 2n=18.
Ecology: Uncommon. Escape from cultivation in disturbed areas, fields; Elevation: > 1000 m. Bioregional Distribution: KR, NCoRO, c SNH, expected elsewhere; Distribution Outside California: native to Europe. Flowering Time: Mar--Apr
eFlora Treatment Author: Linda E. Watson
Reference: Watson 2006 FNANM 19:537--538
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Citation for this treatment: Linda E. Watson 2012, Anthemis arvensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 21, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on February 21, 2018.

Anthemis arvensis
click for enlargement
© 2008 Keir Morse
Anthemis arvensis
click for enlargement
© 2008 Keir Morse

More photos of Anthemis arvensis in CalPhotos

Geographic subdivisions for Anthemis arvensis:
KR, NCoRO, c SNH, expected elsewhere;
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).

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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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.