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Calendula arvensis
Species of flowering plant From Wikipedia, the free encyclopedia
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Calendula arvensis is a species of flowering plant in the daisy family known by the common name field marigold. It is native to central and southern Europe, North Africa and the Middle East[3] and it is known across the globe as an introduced species.[4][5]
Calendula arvensis is an annual or biennial herb 10 to 50 cm (3.9 to 19.7 in) tall. The leaves are lance-shaped and borne on petioles from the slender, hairy stem. The inflorescence is a single flower head up to four centimeters wide with bright yellow to yellow-orange ray florets around a center of yellow disc florets. The fruit is an achene which can take any of three shapes, including ring-shaped, that facilitate different methods of dispersal.[6][7]
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Achene
Calendula arvensis produce three types of achenes (fruits of the sunflower family), they are rostrate, cymbiform and annular. Rostrate and cymbiform are suitable for long-distance diffusion, because they have larger size and weight than annular, while annular is suitable for short-distance diffusion.[8]
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