Bracken leaves. Coloured scanning electron micrograph (SEM) of the leaves of a bracken plant (Pteridium aquilinum). The undersides of the leaves are covered in spore-containing sacs known as sporangia (brown). The spores are released when the wall of a sporangium dries and splits to throw the spores away from the plant.
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Creative#:
TOP10168067
Source:
達志影像
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RM
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