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Journal of Biological Sciences
Year: 2002  |  Volume: 2  |  Issue: 5  |  Page No.: 315 - 319

Taxonomic Study of the Genus Launaea L. from Pakistan

Sohail Jamil Qureshi, Abdul Ghani Awan, Mir Ajab Khan and Sofia Bano    

Abstract: The genus Launaea L. belongs to the tribe Lactuceae in family Asteraceae/Compositae whose taxonomic study has been carried out from Pakistan. The genus Launaea belongs to the tribe Lactuceae of Asteraceae. In this genus eight species were considered for morphological study i.e. Launaea intybacea, L. aspelinifolia, L. capitata, L. procumbens, L. microcephala, L. spinosa, L. massauensis and L. residifolia. Material for taxonomic studies was obtained from naturally occurring population and from herbarium of Quaid-i-Azam University (ISL). In Launaea asplinifolia the achenes are elliptical, + 5-ribs are present on each face and neck absent. In L. capitata the leaves are mostly basal while L. intybacea leaves ½ amplexicaul, auriculate, auricles rounded with long fine points. Launaea microcephala differs from Launaea procumbens in being annual, sparsely pubescent to villous herb and in possessing terminal heads on the dichotomously branched flowering stem, involucral bracts many-seriate, and the achenes are of one type.

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