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dc.contributor.authorAksoy, A.*
dc.contributor.authorHale, William H.G.*
dc.contributor.authorDixon, Jean M.*
dc.date.accessioned2008-08-15T13:05:17Z
dc.date.available2008-08-15T13:05:17Z
dc.date.issued1999
dc.identifier.citationAksoy A, Hale WHG and Dixon JM (1999) Towards a simplified taxonomy of Capsella bursa-pastoris (L.) Medik. (Brassicaceae). Watsonia. 22: 243-250.
dc.identifier.urihttp://hdl.handle.net/10454/486
dc.descriptionYes
dc.description.abstractCapsella bursa-pastoris (L.) Medik. is a species with a cosmopolitan distribution which shows considerable morphological variation. Numerous authors have recognised widely differing numbers of varieties, microspecies or other infraspecific subdivisions (segregates) of this species. In an attempt to clarify this situation, we grew British material of the species under controlled conditions through to the F) generation to remove environmental variation, and assessed the plants on the basis of a range of morphological criteria, namely leaf shape, capsule size and also length of time taken to flower. Analysis of these characteristics consistently produced four basic groups, which had been previously described. Herbarium specimens could also nearly always be assigned to one of these groups. Limited chromosome counts suggest that two of these groups are diploid and two are tetraploid. We suggest this fourfold division into broad groups reflects the major genetic separations within the species, but that there is also considerable phenotypic plasticity shown by C. bursapastoris in response to factors such as shade or trampling. These four groups appear to differ in their geographic.al distribution in Britain. KEYWORDS: Shepherd's Purse, morphological variation, leaf characters, capsule characters, chromosome
dc.language.isoen
dc.rights© 1999 Botanical Society of the British Isles. Reproduced in accordance with the publisher's self-archiving policy.
dc.subjectTaxonomy
dc.subjectCapsella bursa-pastoris (L.) Medik.
dc.subjectBrassicaceae
dc.subjectShepherd's Purse
dc.subjectMorphological Variation
dc.subjectLeaf Characters
dc.subjectCapsule Characters
dc.subjectChromosome
dc.titleTowards a simplified taxonomy of Capsella bursa-pastoris (L.) Medik. (Brassicaceae)
dc.status.publishedPublisheden_US
dc.status.refereedYes
dc.typeArticle
dc.type.versionPublished version
dc.rights.licenseUnspecified
refterms.dateFOA2018-07-18T13:10:02Z
dc.openaccess.statusopenAccess


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