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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]
Lamium galeobdolon, the yellow archangel, is a species of flowering plant in the mint family Lamiaceae. It is native to Europe and western Asia but it is widely introduced in North America and elsewhere. It is the only species in the genus Lamium with yellow flowers. Another common name for this species is golden dead-nettle.
The flowers are bright yellow, 7–10 cm (2.8–3.9 in) across, with the typical iris form. The fruit is a dry capsule 4–7 cm (1.6–2.8 in) long, containing numerous pale brown seeds. I. pseudacorus grows best in very wet conditions, and is common in wetlands, where it tolerates submersion, low pH , and anoxic soils.
The yellow flowers have five regular parts and are up to 6 millimetres (1 ⁄ 4 inch) wide. Depending upon rainfall, the flowers appear at any time during the year. The flowers open singly at the center of the leaf cluster for only a few hours on sunny mornings. The tiny seeds [5] are formed in a pod that opens when the seeds mature.
The leaves are a dull-green or yellow-green colour. They are very slightly curved and have serrated sides near the tips. [4] The yellow flowers are produced from April to October, and range from 6.4 to 15.2 centimetres (2 + 1 ⁄ 2 to 6 inches) in diameter. [5] Two of the calyx lobes are longer, extending further than the petals.
The stems are usually succulent or semi-succulent, and the leaves are sometimes semi-succulent. [11] [12] The leaves are long, thin and blade-like to lanceolate, from 3–45 cm long (1.2–17.7 in). The flowers can be white, pink, purple or blue, with three petals and six yellow anthers (or rarely, four petals and eight anthers).
Hypericum perforatum, commonly known as St John's wort (sometimes perforate St John's wort or common St John's wort), is a flowering plant in the family Hypericaceae.It is a perennial plant that grows up to 1 metre (3 ft 3 in) tall, with many yellow flowers that have clearly visible black glands around their edges, long stamens (male reproductive organs), and three pistils (female reproductive ...
Each "flower" is actually a disc made up of tiny flowers, to form a larger false flower to better attract pollinators. The plants bear one or more wide, terminal capitula (flower heads made up of many tiny flowers), with bright yellow ray florets (mini flowers inside a flower head) at the outside and yellow or maroon (also known as a brown/red ...