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Dryopteris expansa Spiny Wood Fern (1 Page of 5) The Dryopteris expansa plant species is found in Northern Temperate Zone It is a member of the Dryopteridaceae family. Common gardeners may know the plant as Spiny Wood Fern. Cultivation | Propagation | General Uses Medicinal | Edible Uses Latin Name: Dryopteris expansa Common Name: Spiny Wood Fern Family: Dryopteridaceae Author: (Presl.)Fraser-Jenkins&Jermy. Known Hazards: Although we have found no reports for this species, a number of ferns contain carcinogens so some caution is advisable[200].
The fresh plant contains thiaminase, an enzyme that robs the body of its vitamin B complex. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase[172]. However, there have been reports for other species of ferns suggesting that even cooked fronds can have a long term harmful effect. Some caution is therefore advised. Mature Height: 0.4 Mature Width: 0.5 Habitat: Cool moist woods, often on rotting logs and tree stumps[256].
Edible Uses: Root - raw or cooked[256]. Baked and then peeled before being eaten[257]. The raw root is rather bitter but they develop a sweet taste when cooked and are said by some people to develop a flavour rather like sweet potatoes[256]. The root is best harvested in early autumn. At this time the rhizomes are surrounded by scaly, finger-like projections - if the projections are flat and dark inside then the rhizomes are not good to eat but if they are round, fleshy and light-coloured then they can be eaten[256].
The young shoots, harvested in spring before they have fully unfurled, can be cooked and eaten[257]. They can be added to soups[257].
For further Dryopteris expansa gardening information click on one of the blue links below Cultivation | Propagation | General Uses Medicinal | Edible Uses
The information above has been supplied solely via the hard work and dedication of the team at 'Plants for a Future'. View their bibliography

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