Christmas Fern – Polystichum acrostichoides Share this:Click to share on Pinterest (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Shop our Growers Choice Subscription! Shop Now Designed with love! Our Grower's Choice Subscription freshly picked and delivered to your door every month. Shop Now Common Name: Oregon Fern, Christmas Fern, Dagger Fern Botanical Name: Polystichum acrostichoides, po-LIS-ti-kum a-cro-stich-OID-es Decorative Life: 10-20 days. Tidbits: From the Greek “polys”, meaning many and “stix” for row, in reference to the regular rows of sori seen on many species.