Azolla pinnata
Azolla pinnata
Safety & Hazards
Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable[ 200 Title The New RHS Dictionary of Gardening. 1992. Publication Author Huxley. A. Publisher MacMillan Press Year 1992 ISBN 0-333-47494-5 Description Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed. ]. 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[ 172 Title Discovering Wild Plants - Alaska, W. Canada and the Northwest. Publication Author Schofield. J. J. Publisher Alaska Northwest Books; Alaska Year 2003 ISBN 0882403699 Description A nice guide to some useful plants in that area. ].
Botanical Description
Water fern is a very small, evergreen plant, only 2.5cm long, floating on water and capable of producing large colonies due to the way it increases by budding off[ 200 Title The New RHS Dictionary of Gardening. 1992. Publication Author Huxley. A. Publisher MacMillan Press Year 1992 ISBN 0-333-47494-5 Description Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed. ]. Species of Azolla are of considerable economic importance in countries such as China and Vietnam where they grow in rice paddies and in flooded fields used for other crops such as taro (Calocasia )[ 286 Title Flora of Australia Publication Author Website http://www.anbg.gov.au/abrs/abif/flora/ Publisher Year 0 ISBN Description The full information from the Flora of Australia - on-line. An excellent resource. ]. The symbiotic cyanobacterium Anabaena azollae fixes atmospheric nitrogen, which is made available to the crop as a nutrient when the Azolla dies[ 286 Title Flora of Australia Publication Author Website http://www.anbg.gov.au/abrs/abif/flora/ Publisher Year 0 ISBN Description The full information from the Flora of Australia - on-line. An excellent resource. ]. The plant's rapid vegetative increase is exploited by rice growers as a means of adding bulk matter and humus to the soil[ 46 Title Dictionary of Economic Plants. Publication Author Uphof. J. C. Th. Publisher Weinheim Year 1959 ISBN - Description An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader. ].