| Scientific Name: | Osmunda regalis |
| Common Name: | royal fern |
| Family Name: | Osmundaceae |
| Origin: | Canada - eastern, South America, U.S. - northeast |
| Hardiness Zone: | Zone 3: (-40 to -34 °C) |
| Plant Type: | Fern |
| Mature Size: | 1.3 - 2.0m x 0.6 - 1.0m (height x width) |
| Habit: | Arching, Stiffly upright, Upright |
| Form: | Vase |
| Texture: | Medium |
| Landscape Uses: | Accent plant, Container planting, Fall interest, Mixed shrub border, Specimen plant, Waterside planting, Wetland - bogs, Woodland margin |
| Exposure: | Full sun only if soil kept moist, Part sun/part shade, Filtered shade |
| Soil or Media: | Acidic, Bog, Humus rich |
| Leaves: | Compound, Fern-like, Basal, Leathery, Glabrous, Bipinnate, Lanceolate, Oblong, Serrulate |
| Flowers: | |
| Fruit: | Sporangium (spores), Yellow, Brown, Jul-Aug |
| Key ID Features: | |
| Large shade-loving fern; fronds erect, broadly ovate, 50-100(-180)cm long x 30-50cm wide, twice pinnate, pinnae 5-7 pairs, 14-25cm long x 6-10cm wide, pinnules alternate, oblong, 7-10 pairs, most 4-7cm long x 1-2cm wide, attached to rachilla by a <1mm stalk, fertile pinnae towards the frond apex with pinnules twisted and covered with marginal sori. | |