Ragweed pollen (Ambrosia psilostachya), SEM

Ragweed pollen (Ambrosia psilostachya), SEM

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Caption: Ragweed pollen -Ambrosia psilostachya, scanning electron micrograph (SEM). This pollen is an allergen. Ragweed is a main cause of weed allergies. Ragweed pollen is notorious for causing allergic reactions in humans, specifically allergic rhinitis. Up to half of all cases of pollen-related allergic rhinitis in North America are caused by ragweeds. One of the main contributors to fall allergies is the ragweed plant. A single plant can produce one billion pollen grains per season. Ragweed grows abundantly throughout the South, North, and Midwest, and its lightweight pollen grains can travel up to 400 miles in the wind. Magnification: x450 when shortest axis printed at 25 millimetres.

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Keywords: 8708c, allergen, allergenic, allergenic pollen, allergic reaction, allergic rhinitis, ambrosia, ambrosia artemisiifolia, ambrosia psilostachya, american wormwood, anemophily, annual ragweed, asteraceae, asterales, asterid, asterids, bitterweed, black and white, blackweed, carrot weed, compositae, cuman ragweed, false-colored, hay fever, hay fever pollen, hay fever weed, monochrome, perennial ragweed, plant, plant pollen, plants, pollen, ragweed, ragweed pollen, rhinitis, roman wormwood, scanning electron micrograph, sem, stammerwort, stickweed, tassel weed, western ragweed, wind pollination

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