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Ambrosia artemisiifolia is an annual plant that emerges in late spring. It propagates mainly by rhizomes, [clarification needed] but also by seed. [4] It is much-branched, and grows up to 70 centimetres (2.3 ft) in height. [9] The pinnately divided soft and hairy leaves are 3–12 centimetres (1.2–4.7 in) long. [9]
This is a hairy annual or biennial herb producing stems which grow upright or lie along the ground to a maximum length of 30 to 40 centimeters. [5] It produces yellow flowers May–July that fade to white with four small petals about 1.5–3 mm long. [6] [7] The fruit is a round, hairy capsule up to half a centimeter long.
The species Brassica napus belongs to the flowering plant family Brassicaceae. Rapeseed is a subspecies with the autonym B. napus subsp. napus. [11] It encompasses winter and spring oilseed, vegetable and fodder rape. [12] Siberian kale is a distinct leaf rape form variety (B. napus var. pabularia) which used to be common as a winter-annual ...
It flowers very profusely, [50] and the large flower heads are borne on stalks 5–9 cm (2–3.5 in) above the foliage. Unlike other forms, the stems wither and die naturally after flowering, making way for more new growth and flowers. [51] The flower heads are golden yellow and measure 6 cm (2.5 in) across. [7]
There are two subspecies, T. h. austropurpureum which has violet-purple flowers and T. h. pilosum with yellow flowers. [19] The Canary creeper (Tropaeolum peregrinum) is a trailing and climbing half-hardy annual species with wiry stalks and palmately lobed leaves. The pale yellow, fringed flowers are borne on long stalks.
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 false flower to better attract pollinators.