Plant morphology share the same basic structure and development as leaves in other plants, and therefore cactus spines are homologous to leaves as well. This aspect of plant morphology overlaps with the study of plant evolution and paleobotany. Secondly, plant morphology observes both the vegetative (somatic) structures of plants, as well as the reproductive structures. The vegetative structures of vascular plants includes the study of the shoot system, composed of stems and leaves, as well as the root system. The reproductive structures are more varied, and are usually specific to a particular group of plants, such as flowers and seeds, fern sori,
Anemone nemorosa tint on the backs of the tepals. The flowers are pollinated by insects, especially hoverflies. The seeds are achenes. The yellow wood anemone ("Anemone ranunculoides") is slightly smaller, with yellow flowers and usually without basal leaves. Wood sorrel "Oxalis acetosella", which grows in similar shaded places, can be readily distinguished by its ternate and clover-like leaves and smaller flowers with 5 white petals and 5 sepals. The plant contains poisonous chemicals that are toxic to animals including humans, but it has also been used as a medicine. All parts of the plant contain protoanemonin, which can cause severe skin and