Patricia AWEH

This study investigates the cyto-morphological characteristics of two Nigerian species of the family Asteraceae, namely Aspilia africana and Spilanthes costata. Cyto-morphological studies are essential in plant taxonomy as they help in understanding the structural and chromosomal features that contribute to the classification, identification, and evolutionary relationships of plant species. The study aims to examine both the cytological and morphological attributes of these plants in order to provide useful taxonomic information. The research involves the collection of plant samples from selected locations, followed by detailed laboratory analysis. Morphological observations were carried out based on visible plant characteristics such as leaf shape, stem structure, flower arrangement, and growth pattern. Cytological studies were conducted using microscopic techniques to examine chromosome number, cell structure, and other cellular features. These analyses were used to identify similarities and differences between the two species. The results reveal variations in both morphological traits and cytological characteristics between the studied species, which provide valuable information for their classification and identification within the Asteraceae family. The findings also highlight the importance of combining cytological and morphological approaches in plant taxonomy and biodiversity studies. The study concludes that cyto-morphological analysis remains a useful tool in understanding plant diversity and improving the systematic classification of plant species. It further recommends additional molecular and genetic studies to complement cytological and morphological investigations for more accurate plant identification and evolutionary studies.

Studies on the morphology and cytology of two species, Aspilia africana and Spilanthes costata B. family Asteraceae, were conducted. The departmental botanical garden served as the source for the many specimens used.
The following was done cytological study, which includes mitosis and meiosis; tests showed that it was not possible to successfully confirm the chromosomal numbers of the two specimens. Epidermal morphology results showed that both specimens had anomocytic stomata and were amphistomatic. The average specimen height, as well as the average length and breadth of the leads, were determined and reported. Fertility in pollen was noticed