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![Christmas fern sori full of spores on the underside of pinna (Polystichum acrostichoides)](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627113097-UEIFXYC56Q34PATIM4R3/IMG_5408.jpeg)
![Fern sori launching spores at 20x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632628144575-487FC8SXJHASGJCRAKW8/image-asset.jpeg)
![Sorus full of spores at 100x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627122098-MSYRXO6ZOWX0BXT4FH6T/IMG_0147.jpeg)
![Fern spores at 100x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627110873-6ADI4PH9QBZ4JIRKACSU/IMG_8992.jpeg)
![Fern spores at 400x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627121479-P5AEHS0SNFXCHKHEB60T/IMG_0150.jpeg)
![Fern gametophyte (haploid) at 40x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627131222-DGQ2AYACZQU22FM61I6P/IMG_7462.jpeg)
![Fern antheridia full of gametes at 400x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632630430199-W0KBLWLON4PH8DX0TMCV/IMG_7465.jpeg)
![Swimming fern gamete (sperm) at 400x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632628393782-QEALAZGTC05ZQJ2L8PIF/image-asset.jpeg)
![Archegonia with egg cell at 400x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1636351174498-0QKA1Y9CGZB4WLOOQ6TS/IMG_0079.jpeg)
![Newly emerged fern sporophyte (diploid) at 100x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1674061056493-68R4S02S720AKQX51PK3/IMG_7114.jpeg)
![Fern gametophyte giving rise to sporophyte (diploid) at 20x](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627114420-BPQLO68C4UN026BAGQ50/IMG_7454.jpeg)
![Fern gametophytes and sporophytes on rock wall](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1641028986386-UKAB503A6X9EXJ00FUK4/IMG_1341.jpeg)
![Several gametophytes and sporophytes in highly shaded area (Pteris multifida)](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1641029382252-1IOBRNUBOW93SL1BZCPF/764AAE53-1954-439F-83F2-753E0EDF97E1.jpeg)
![Fern fiddle head (sporophyte)](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627125810-9K78TTHQL3WLIWR6D96B/IMG_2928.jpeg)
![Christmas fern fronds (Polystichum acrostichoides) in Great Smoky Mountains National Park](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632627123715-UZOHRGGPT22J6QNHXPT5/IMG_2024.jpeg)
![Field of bracken ferns in Yosemite National Park (Pteridium aquilinum)](https://images.squarespace-cdn.com/content/v1/57b4355cbe65942bdfc8d605/1632638365315-8OHQQ2674J25MCUB6WLX/IMG_7065.jpeg)