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A flower, also known as a bloom or blossom, [1] is the reproductive structure found in flowering plants (plants of the division Angiospermae).Flowers consist of a combination of vegetative organs – sepals that enclose and protect the developing flower.
The flowers bloom all throughout the year and are produced in clusters of 3 to 12 together at the ends of branches. [12] They are strongly scented, with a white corolla 2 to 3 cm (0.79 to 1.18 in) in diameter with 5 to 9 lobes. The flowers open at night (usually around 6 to 8 in the evening), and close in the morning, a span of 12 to 20 hours. [6]
Sunflowers do not always point to the Sun. Flowering sunflowers face a fixed direction (often east) all day long, but do not necessarily face the Sun. [123] However, in an earlier developmental stage, before the appearance of flower heads, the immature buds do track the Sun (a phenomenon called heliotropism). Mature flowers face east. [124]
From top left, clockwise: COVID-19 became a global pandemic in 2020 and dominated the early part of the decade, as the disease and the virus that causes it were deemed an international public health emergency until 2023; A Ukrainian tank driving in the Donetsk region during the Russian invasion of Ukraine; A U.S. plane carries passengers out of Afghanistan during the 2021 fall of Kabul at the ...