Egeria (plant) particularly in Europe, fast-growing, adaptable plants such as "Egeria" can spread quickly and cause major damage to native plants and wildlife. Egeria (plant) Egeria is a genus of three species of aquatic plants in the family Hydrocharitaceae described as a genus in 1849. native to warm-temperate South America. The genus was formerly included in the related genus "Elodea", from which it differs in having the leaves in whorls of four or more, not three, and in having more conspicuous flowers with larger (particularly broader) petals. "Egeria" is found in many temperate and subtropical regions throughout the world as an introduced,
Plant evolutionary developmental biology slight changes in the MADS-box genes and their expression pattern in the monocots. Another example is that of the toad-flax, "Linaria vulgaris", which has two kinds of flower symmetries: radial and bilateral. These symmetries are due to epigenetic changes in just one gene called "CYCLOIDEA". "Arabidopsis thaliana" has a gene called "AGAMOUS" that plays an important role in defining how many petals and sepals and other organs are generated. Mutations in this gene give rise to the floral meristem obtaining an indeterminate fate, and many floral organs keep on getting produced. We have flowers like roses, carnations and morning glory,