Athyrium filix-femina ssp. asplenioides (Lady fern) - Zones 5-10, Height 18-30 in. Also known as Athyrium asplenioides. Handsome crowns of feathery fronds are typical of this genus. Delicate and lacy with arching fronds and dark red stems at maturity. Strong-growing and dependable, the Lady Ferns are great garden plants. A breathtaking flush of new fronds appears in the spring, with new leaves appearing throughout the season for a continuously fresh look.