Allergenic pollen, coloured scanning electron micrograph (SEM). Ragweed (Ambrosia psilostachya, yellow), sagebrush (Artemisia tridentata, light brown), timothy (Phleum pratense, light green), scotch broom (Cytisus scoparius, purple), alder (Alnus glutinosa, dark green) and poplar (Populus sp. orange). Magnification: x200 when shortest axis printed at 25 millimetres. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DENNIS KUNKEL MICROSCOPY |
Taille de l’image : | 3335 px × 2620 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |