Height 30cm, evergreen. Semi-hardy.
This is one of the smallest of the Boston Ferns and such is perfect for terrariums and an excellent houseplant, may even be worth a try in warmer zone 8 areas.
Keep compost moist, water when top 2cm or so is dry. It prefers low, filtered light and a high humidity. Very easy going plant.
Nephrolepsis cordifolia 'Duffii'- Lemon Button Fern 12cm €8.95
Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, via Wikimedia Commons