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Osmunda claytoniana is a Fern found in areas such as E. Asia - China, Japan, Himalayas. Eastern N. America. A member of the Osmundaceae family, Osmunda claytoniana L is also known by its common name of Interrupted Fern. The Fern can grow to a height of 0.5 meters and up to 0.3 meters wide. The preferred habitat of Wet places in C. Japan. Open slopes, rarely in forests, 2800 - 3300 metres in Kashmir., with LMH soil and SN moisture levels. .
Interrupted Fern is a zone 3 hardy plant that has medicinal uses - the medicinal usage rating of Interrupted Fern is 1The roots are used as an adulterant for Dryopteris felix-mas in the treatment of internal worms.
Osmunda claytoniana is a non flowering plant which is pollinated by .
Known hazards of the plant: Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable. Many ferns also contain 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.
The plant has an edibility rating of 2The young fronds are eaten. Cooked as a vegetable[177, 272]. The centre of the clump, below ground level, is the source of a small edible
pith called 'fern butter'.
Cultivation tips: Likes a soil of swamp mud and loamy or fibrous peat, sand and loam. Succeeds in most moist soils, preferring acid conditions. Requires a constant supply of water, doing well by ponds, streams etc. Plants thrive in full sun so long as there is no shortage of moisture in the soil and also in shady situations beneath shrubs etc. Requires a shady position. Plants are hardy to at least -20°c, they are evergreen in warm winter areas but deciduous elsewhere. Members of this genus are rarely if ever troubled by browsing deer. A very ornamental plant.
. The plant should best be propagated by Spores - they very quickly lose their viability (within 3 days) and are best sown as soon as they are ripe on the surface of a humus-rich sterilized soil in a lightly shaded place in a greenhouse. Keep the compost moist, preferably by putting a plastic bag over the pot. Plants develop very rapidly, pot on small clumps of plantlets as soon as they are large enough to handle and keep humid until they are well established. Do not plant outside until the ferns are at least 2 years old. Cultivars usually come true to type. Division of the rootstock in the dormant season. This is a very strenuous exercise due to the mass of wiry roots.
The young fronds are eaten. Cooked as a vegetable[177, 272]. The centre of the clump, below ground level, is the source of a small edible pith called 'fern butter'.