DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Scanning electron micrograph of sagebrush pollen (Artemisia tridentata); an allergen. Artemisia tridentata, commonly called big sagebrush or sagebrush, is an aromatic shrub from the family Asteraceae. It grows in arid and semi-arid conditions, throughout a range of cold desert, steppe, and mountain habitats in the Intermountain West of North America. Sagebrush pollen is known as an allergen. Sagebrush provides food and habitat for a variety of species, such as sage grouse, pronghorn antelope, pygmy rabbit, and mule deer. Magnification: x540 when shortest axis printed at 25 millimetres.
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