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The plant has an erect rough-hairy stem, reaching typical heights of 3 metres (10 feet). The tallest sunflower on record achieved 9.17 m (30 ft 1 in). [3] Sunflower leaves are broad, coarsely toothed, rough and mostly alternate; those near the bottom are largest and commonly heart-shaped.
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 giganteus is a perennial herbaceous plant native to the northern United States and southern Canada that can grow up to 1–3 metres (3.3–9.8 ft) tall with instances to 4m (13 feet).
It grows up to 2.5 – 4 meters in height within a year. It has heart-shaped or oval, hairy green leaves. They bloom in the summer with a disk that is 12 inches or 30 centimeters in diameter and has a brown color in appearance. [1]
The conifer division of plants includes the tallest organism, and the largest single-stemmed plants by wood volume, wood mass, and main stem circumference.The largest by wood volume and mass is the giant sequoia (Sequoiadendron giganteum), native to Sierra Nevada and California; it grows to an average height of 70–85 m (230–279 ft) and 5–7 m (16–23 ft) in diameter. [1]
Spiciform panicle that usually reaches 4 to 5 meters (13 to 16 feet) in height, but has a maximum recorded height of 8 meters (26 feet). The total height of the plant when blooming may reach 15 meters (49 feet). The stem at the base of the inflorescence may be 60–90 cm (24–35 in) in height and a very thick 20–40 cm (7.9–15.7 in). [17]
Rafflesia arnoldii, the world largest flower in Bengkulu - Indonesia. With a flower growing up to 1.5 m (5 ft) in diameter, 3–4 m (10–13 ft) in perimeter and 10–12 kg (22–26 lb) in weight, Rafflesia arnoldii is the world's current largest individual flower.
Helianthus occidentalis, the fewleaf sunflower or western sunflower, [3] is a species of sunflower native to the Eastern and Central United States. It grows mostly in the Great Lakes Region and in the Ozarks , with additional populations scattered as far as Massachusetts , Texas , and the Florida Panhandle .