DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Moss perigonium. Light micrograph of a section through the perigonium of a male haircap moss (Polytrichum formosum) plant, showing the paraphysis (pink, centre) and antheridia (male reproductive organs, red, centre) inside. The perigonium is a bundle of modified leaves surrounding the antheridia. The antheridia produce the male gametes (antherozoids, 'sperm') which fuse with the female ova (eggs) to ultimately form spores. Magnification: x7 when printed 10 centimetres wide.
Model release not required. Property release not required.