Glebionis segetum
species of plant
Glebionis segetum (syn. Chrysanthemum segetum) is a species of flowering plant in the family Asteraceae, probably native only to the eastern Mediterranean region but now naturalized in western and northern Europe as well as China and parts of North America. Common names include corn marigold and corn daisy.
Glebionis segetum has been hybridized with related Argyranthemum species to create cultivars of garden marguerites.
Glebionis segetum is a herbaceous annual plant growing to 80 cm (31 in) tall, with spirally arranged, deeply lobed leaves 5–20 cm (2.0–7.9 in) long. The flowers are bright yellow, produced in capitula (flowerheads) 3.5–5.5 cm (1.4–2.2 in) in diameter, with a ring of ray florets and a centre of disc florets.
Glebionis segetum is widely naturalised outside of its native range, colonising western and central Europe with early human agriculture; it can be an invasive weed in some areas. However, it also was ranked very highly, in terms of nectar production, thus showing particular value in the role of nectar-provider for insects in a UK survey of meadow species' production of nectar sugar and pollen. Glebionis segetum was practically an exact equivalent in terms of how much nectar and pollen it produced in this study with the popular garden and meadow plant, cornflower Centaurea cyanus—the top producer of nectar sugar among the cultivated plants in the study (as opposed to those classified as weeds). Its long blooming period helps its ranking, as it does not have few flowers with very high nectar volume per flower—coupled with a brief blooming period that completely exhausts the plant, like some top-ranked plants in nectar sugar production surveys (e.g.
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