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The common sunflower (Helianthus annuus) is a species of large annual forb of the daisy family Asteraceae. The common sunflower is harvested for its edible oily seeds which are used in the production of cooking oil.
Helianthus annuus (Common Sunflower) is a tall, fast-growing annual with broad, oval to heart-shaped, roughly hairy leaves. It produces huge, brilliant flowers in summer, up to 12 in. across (30 cm), with yellow petals surrounding a dark chocolate central disk.
Jun 25, 2024 · The common sunflower (H. annuus) is an annual herb with a rough hairy stem 1–4.5 metres (3–15 feet) high and broad, coarsely toothed, rough leaves 7.5–30 cm (3–12 inches) long arranged in spirals.
Helianthus annuus or Common Sunflower is an annual herb that can reach up to 3 m in height. Leaves are ovate to heart-shaped, covered in coarse hairs. The single large yellow flower is known as a Capitate inflorscence made up of yellow ray and disk florets.
While they may look like single ‘flowers’, each sunflower is actually a flower head composed of hundreds of tiny flowers or florets, a trait common to members of the Asteraceae or Aster family to which sunflowers belong.
The common sunflower has a green erect stem covered in coarse hairs, growing on average around 2m tall. The leaves are broad, with serrated edges, and are alternately arranged on the stem. The ‘flower’ of the common sunflower is actually a pseudanthium, or flowerhead, made up of many small flowers.
With bright blooms that go all summer, sunflowers are heat-tolerant, resistant to pests, and attractive to pollinators. Harvest the seeds in late summer and fall for a healthy snack, or feed them to the birds! Learn how to plant, grow, and care for sunflowers.
The best-known species is the common sunflower (Helianthus annuus). This and other species, notably Jerusalem artichoke ( H. tuberosus ), are cultivated in temperate regions and some tropical regions, as food crops for humans, cattle, and poultry, and as ornamental plants. [7]
Common Sunflower is an open land species, generally on moist soils. It is a species of prairies and other grasslands, old fields, roadsides, railroad rights-of-way, savannas, and forest edge. It is found across the conterminous U.S., but probably is native to the central and southern portion of the range and Mexico.
The common sunflower (H. annuus) is an annual herb with a rough hairy stem 1–4.5 metres (3–15 feet) high and broad, coarsely toothed, rough leaves 7.5–30 cm (3–12 inches) long arranged in spirals.
