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Bellis perennis is a common European species of Daisy, often considered the archetypal species of that name. Many related plants also share the name "Daisy", so to distinguish this species from other daisies it is sometimes qualified as Common Daisy, Lawn Daisy or occasionally English daisy. It is native to western, central and northern Europe. The species is widely naturalised in North America, and also in South America

The sunflower is native to the Central Americas. The evidence thus far is that it was first domesticated in Mesoamerica, present day Mexico, by at least 2600 BC.It may have been domesticated a second time in the middle Mississippi Valley, or been introduced there from Mexico at an early date, as maize was. The earliest known examples of a fully domesticated sunflower north of Mexico have been found in Tennessee and date to around 2300 BC.

Echinacea species are herbaceous, drought-tolerant perennial plants growing up to 140 cm in height.
They grow from taproots, except E. purpurea, which grows from a short caudice with fibrous roots. They have erect stems that in most species are unbranched.
Both the basal and cauline leaves are arranged alternately. The leaves are normally hairy with a rough texture, having uniseriate trichomes (1-4 rings of cells) but sometimes they lack hairs.
The basal leaves and the lower stem leaves have petioles, and as the leaves progress up the stem the petioles often decrease in length. The leaf blades in different species may have one, three or five nerves. Some species have linear to lanceolate shaped leaves, and others have elliptic- to ovate-shaped leaves; often the leaves decrease in size as they progress up the stems. Leaf bases gradually increase in width away from the petioles or the bases are rounded to heart shaped. Most species have leaf margins that are entire, but sometimes they are dentate or serrate.

More Infos at Wikipedia ( en.wikipedia.org/wiki/Echinacea )

The oxeye daisy (Leucanthemum vulgare, syn. Chrysanthemum leucanthemum), also known as the marguerite, is a widespread flowering plant native to Europe and the temperate regions of Asia. It is one of a number of plants to be called by the common name daisy. It is also sometimes called moon daisy or dog daisy.

More infos at wikipedia