Hussein, H., Eldemerdash, M. (2017). Comparative Morphology and Surface Microsculpture of Cypsela in Some Taxa of the Asteraceae and Their Taxonomic Significance. Egyptian Journal of Botany, 56(2), 409-422. doi: 10.21608/ejbo.2017.1133
H. A. Hussein; Marwa M. Eldemerdash. "Comparative Morphology and Surface Microsculpture of Cypsela in Some Taxa of the Asteraceae and Their Taxonomic Significance". Egyptian Journal of Botany, 56, 2, 2017, 409-422. doi: 10.21608/ejbo.2017.1133
Hussein, H., Eldemerdash, M. (2017). 'Comparative Morphology and Surface Microsculpture of Cypsela in Some Taxa of the Asteraceae and Their Taxonomic Significance', Egyptian Journal of Botany, 56(2), pp. 409-422. doi: 10.21608/ejbo.2017.1133
Hussein, H., Eldemerdash, M. Comparative Morphology and Surface Microsculpture of Cypsela in Some Taxa of the Asteraceae and Their Taxonomic Significance. Egyptian Journal of Botany, 2017; 56(2): 409-422. doi: 10.21608/ejbo.2017.1133
Comparative Morphology and Surface Microsculpture of Cypsela in Some Taxa of the Asteraceae and Their Taxonomic Significance
Department of Botany, Faculty of Science, Zagazig University, Zagazig
Abstract
MACRO- and micromorphological characteristics of cypsela in 13 species and one subspecies representing genera: Carthamus L., Centaurea L. Cichorium L., Cirsium Mill., Crepis L., Lactuca L., Picris L., Reichardia Roth, and Sonchus L.; belonging to the two tribes Cardueae and Cichorieae of the Asteraceae were examined under stereomicroscopy and scanning electron microscopy (SEM). The cypsela macromorphological features including; cypsela length measurements, colour, shape, surface texture and the number of ribs when present as well as the abscission scar characteristics and details of the surface, microsculpture peculiarities were investigated. The cypsela length and colour presented a minor taxonomic value. However, the other remaining features were proved to be primarily diagnostic at the species level and sometimes at the genus level but not distinctive for any of the two tribes. In addition, these features were very useful in the precise technical identification of the examined cypselae. An identification key for the studied taxa, based on the investigated aspects, was presented.
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