Knowra Zinnia Zinnia Zinnia is a genus of flowering plants in the daisy family, native to the Americas. Its colorful flower heads and long-lasting blooms make several species popular garden plants.
Asteraceae : A family of flowering plants whose small florets are grouped into dense heads, often surrounded by bracts. Zinnia belongs to this family, whose composite flower heads can resemble single blooms.
Zinnia elegans : A widely cultivated zinnia species valued for its large, colorful flower heads and numerous garden varieties. This species supplies many of the familiar florist and garden zinnias.
Carl Linnaeus : A Swedish botanist who developed a widely used system of naming and classifying organisms. Linnaeus named the genus Zinnia in the eighteenth century.
Cosmos (plant) : A genus of flowering plants in the daisy family, native mainly to the Americas and grown ornamentally. Cosmos shares zinnia’s family and garden role but has a different genus and characteristic flower form.
Capitulum : A compact flower cluster in which many small florets sit on a shared receptacle, often appearing as one flower. A zinnia’s colorful display is a capitulum made of many individual florets.
Zinnia angustifolia : A zinnia species with narrow leaves and typically smaller flower heads, often grown as a bedding plant. Its compact growth and heat tolerance broaden the genus’s garden uses.
Johann Gottfried Zinn : An eighteenth-century German botanist and anatomist whose name was commemorated in the genus Zinnia. The genus name honors Zinn, a professor of botany at Göttingen.
Marigold : A common name for several ornamental flowering plants, especially species in the genera Tagetes and Calendula. Marigolds are often grown alongside zinnias but belong to different genera.
Ray floret : A typically strap-shaped floret at the edge of a flower head, often serving a visual signaling role. The prominent outer florets give many zinnia heads their familiar petal-like appearance.
Annual plant : A plant that completes its life cycle, from germination to seed production, within one growing season. Many cultivated zinnias are grown as annuals and raised anew from seed each year.
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