One of a plant that is usually used as a green roadside plant in the urban area is mahogany (Swietenia macrophylla K.). The influence of environmental pollution in plants can be seen from stomata in the leaves. This study was aimed to determine the characteristic of the mahogany leaf stomata in a polluted environment. The observed characteristics were a type of stomata, density and distribution stomata. The research was conducted in March to July 2019 in the Botanical Laboratory, Faculty of Mathematics and Science of Natural Sciences, Universitas Negeri Padang. Samples were collected on Prof. Dr. Hamka street and controls were collected at Bung Hatta Forest Parks. The method of stomata observation was a replica method. The type of stomata found was anomocytic. The difference in stomata density in both locations was significant. The stomata density on Jl. Prof. Dr. Hamka was higher than that of Bung Hatta Forest Parks. Stomata of mahogany were found on the lower part of the leaf or also called hypostomatic distributed.

Ketapang (Terminalia catappa L.) is a type of plant that is widely planted on the roadside of urban areas that functions as a green plant. The response from green plants exposed to pollutants originating from motorized vehicles can be seen from the leaf stomata. This study aimed to determine the characteristics of the stomata of Ketapang leaves in areas with different environmental conditions. The parameters observed were density and stomata distribution. The sample was taken in Bung Hatta Forest Park and on the edge of Prof. Dr. Hamka streets. Observation of stomata using preparations with replica or mold method. The results showed that there were significant differences in the stomata density of Ketapang leaves in both locations. Stomata density on Prof. Dr. Hamka street is higher than the Bung Hatta Forest Park. The average density of the stomata of Ketapang leaves in Bung Hatta Forest Park is 132738.09/mm2 while at the edge of Prof. Dr. Hamka street is 232142.85/mm2. The distribution of stomata of Ketapang leaves in both locations showed no difference, i.e. they were of the hypostomatic type (stomata were only found on the lower surface of leaves).