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Published In: Species Plantarum 2: 890. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Synonym Text: Chamomilla Gray, Nat. Art. Brit. Pl. 2: 454.1821; Kay in Tutin et al., l. c. 167. 1976.
General/Distribution: A small genus of 7 species (Bremer & Humphries 1993), widely distributed in Europe, Middle East, temperate Asia, N. Africa and N. America; some are widespread as weeds in S hemisphere. Represented by two species in our flora.
Comment/Acknowledgements: This genus is often confused with Tripleurospermum, from which it is easily distinguishable by its adaxially 5-ribbed achenes.

 

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Annual herb with alternate, 2-3-pinnatisect leaves. Capitula heterogamous and radiate or homogamous and disciform, solitary terminal. Involucre depressed hemispherical, phyllaries 2-3-seriate, with membranous margins. Receptacle conical to subulate, hollow, glabrous. Ray-florets female, fertile, with white ligules. Disc-florets yellow, with 4-5-lobed corolla tube swollen in fruit, lobes spreading, rarely with resin canals; style branches truncate. Cypselas oblong-cylindric, slightly dorsiventrally compressed, thinly 5-ribbed on adaxial side, ribs with myxogenic cells. Pappus absent or a short corona or occasionally, especially in ray-florets, an adaxial auricle.
 

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1 Capitula radiate, with white ligules and 5-lobed tubular florets. Phyllaries greenish, with pale membranous margin. 2 Matricaria recutita
+ Capitula discoid, with yellow, 4-lobed florets. Phyllaries with conspicuous memberanous brown margins. 1 Matricaria aurea
 
 
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