microscopic view of a horsetail equisetum arvense spores

arvense biology blue botanical botany close cluster common dark education educational elaters enlarge enlarged equisetopsida equisetum field green greenish horsetail interference light macro magnification magnify many micrograph microphotograph microphotography microscope microscopic microscopy nature organism plant polarisation polarised polariser polarization polarized polarizer propagation reproduction science scientific spore spores transmitted yellowish