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Acmella oleracea is a species of flowering herb in the family Asteraceae.Common names include toothache plant, Szechuan buttons, [2] paracress, jambu, [3] buzz buttons, [4] tingflowers and electric daisy. [5]
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]
Its yellow and bright flowers have antioxidant properties. [2] In Thailand it is the provincial flower of Nakhon Nayok, Sara Buri, Buri Ram, Suphan Buri and Uthai Thani Provinces. [3] Cochlospermum regium flower with praying mantis, in Laos
Allamanda cathartica, commonly called golden trumpet, [2] common trumpetvine, [2] and yellow allamanda, [2] is a species of flowering plant in the family Apocynaceae. It is native to Brazil . This plant is cited in Flora Brasiliensis by Carl Friedrich Philipp von Martius .
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.
Leaves are opposite, round to oval, usually coarsely and irregularly toothed or lobed. The bright yellow flowers are born on a raceme, most often with five or more flowers. The calyx has five lobes that are much shorter than the flower. Each flower has bilateral symmetry and has two lips. The upper lip usually has two lobes; the lower, three.
The chartreuse yellow flowers are held in dense clusters above the foliage. A. mollis has gained the Royal Horticultural Society's Award of Garden Merit. [4] The plant self-seeds freely and can become invasive. According to some accounts, lady's mantle has been used for centuries as a herbal remedy. [5]
The leaves are spirally arranged, 10–18 centimetres (4–7 in) long, each divided into 5 toothed leaflets, and flowers emerge only from the upper portion of the unbranched stem. The flowers are produced in broad panicles 6–20 centimetres (2–8 in) long, each flower small, star-shaped, reddish brown to purple brown, with five petals.