Flowers

Euphorbia peplus
Euphorbia peplus is native to most of Europe, northern Africa, and western Asia, often invasive to North America and other countries in temperate and sub-tropical regions.

Common adaptation
All of the observed species in the group have at least one shape part in them that prevents other organisms from eaten or destroying them. For example, Conyzinae (flower) has bristle in their plume; maple has teeth in their leaves; bees have a needle that contains venom. This makes sense if species do not have these aggressive "weapons" to protect them, they will be eaten and become distinct.

Unique trait adaptation
Euphorbia peplus has a green flower that is very identical to its leaves, which might prevent it from being eaten or destroyed by other animals.