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When the heads nod downward and the tiny petals on top of the seeds have fallen off, you can cut off the entire sunflower, leaving about a foot of stem. Hang the flower head upside down in a warm ...
Helianthus petiolaris is a North American plant species in the family Asteraceae, commonly known as the prairie sunflower [2] or lesser sunflower. [3] Naturalist and botanist Thomas Nuttall was the first to describe the prairie sunflower in 1821. [4] [5] The word petiolaris in Latin means, “having a petiole”. [5]
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 ...
Globally, sunflowers are the fourth most important oil crop. Most of the sunflower seed crop is crushed for oil, and most of the oil is consumed by humans. A major byproduct of crushing is protein-rich cake, an excellent feed for livestock. A tiny proportion of the global sunflower crop is directly eaten as “nuts” or kernels.
Helianthus annuus 'Russian Giant' is a cultivar of sunflower in the family Asteraceae. [1] It is an annual. [2] [3] [4] ... Its seeds are considered to be edible. [5]
Bacterial diseases; Apical chlorosis Pseudomonas syringae pv.tagetis: Bacterial leaf spot Pseudomonas syringae pv.aptata. P. cichorii Pseudomonas syringae pv.helianthi
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.
Pecos sunflower is an annual, herbaceous plant. It grows 1–3 meters (3.3–9.8 ft) tall and is branched at the top. The leaves are opposite on the lower part of the stem but alternate at the top, lance-shaped with three prominent veins, and up to 17.5 centimeters (6.9 in) long by 8.5 cm (3.3 in) wide.