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  2. Common sunflower - Wikipedia

    en.wikipedia.org/wiki/Common_sunflower

    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.

  3. List of largest plants - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_plants

    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]

  4. Helianthus annuus 'Russian Giant' - Wikipedia

    en.wikipedia.org/wiki/Helianthus_annuus_'Russian...

    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]

  5. Helianthus - Wikipedia

    en.wikipedia.org/wiki/Helianthus

    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 ...

  6. List of world records held by plants - Wikipedia

    en.wikipedia.org/wiki/List_of_world_records_held...

    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.

  7. Helianthus strumosus - Wikipedia

    en.wikipedia.org/wiki/Helianthus_strumosus

    Helianthus strumosus, the pale-leaf woodland sunflower, [3] is a species of sunflower native to North America east of the Great Plains and is in the family Asteraceae. [4] It is a native perennial sunflower that resembles other members of this family including the Pale Sunflower (H. decapetalus), Woodland Sunflower (H. divaricatus), Hispid Sunflower (H. hirsutus), and Jerusalem Artichoke (H ...

  8. Helianthus schweinitzii - Wikipedia

    en.wikipedia.org/wiki/Helianthus_schweinitzii

    De-listing has not been discussed, since the requirements are stricter. The sunflower also did not meet "Threatened" criteria within 5 years. Instead of being reclassified, the sunflower was given a new priority number. This new number corresponds to a high level of threat, as well as a high recovery potential and a potential for economic ...

  9. Helianthus maximiliani - Wikipedia

    en.wikipedia.org/wiki/Helianthus_maximiliani

    Helianthus maximiliani is a North American species of sunflower known by the common name Maximilian sunflower. [ 2 ] This sunflower is named for Prince Maximilian of Wied-Neuwied , who encountered it on his travels in North America.