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Some popular types of perennial sunflowers to grow include: Maximilian sunflower (H. maximiliani). This towering native plant can reaching 7 feet tall. It’s a hardy perennial in Zones 3-9 and ...
Binomial name. Helianthus paradoxus. Heiser. Helianthus paradoxus, the paradox sunflower, puzzle sunflower or Pecos sunflower, is a threatened species of sunflower found only in west Texas, Utah, and New Mexico [1] salt marshes by the edges of inland salt lakes and salt flats. Helianthus paradoxus formed 75,000-208,000 years ago as a hybrid of ...
Helianthus anomalus, the western sunflower, is a species of plants in the family Asteraceae, found in the southwestern United States. Helianthus anomalus is of particular interest due to its genetics. It was produced via hybridization of two other sunflower species, H. annuus and H. petiolaris, multiple times between approximately 60,000 and ...
The disk of a sunflower is made up of many little flowers. The ray flowers here are dried In North Carolina A sunflower seed growing. Sunflowers are usually tall annual or perennial plants that in some species can grow to a height of 300 centimetres (120 inches) or more. Each "flower" is actually a disc made up of tiny flowers, to form a larger ...
Helianthus argophyllus is an annual herb sometimes as much as 300 cm (10 feet) tall. Leaves and stems appear silvery because of a coating of many hairs along the surface. One plant can produce 1-5 flower heads, each 15–20 ray florets surrounding 150 or more disc florets. The plant grows in sandy areas near the seacoast.
Helianthus giganteus is a perennial herbaceous plant hardy to USDA zones 3-9 that can grow up to 1–3 metres (3.3–9.8 ft) tall with instances to 4m (13 feet). The leaves are approximately 1 inch wide by 7 inches long, and partly rough. The flower heads are bright yellow, up to 7 cm (3 in) in diameter.