These photographs are of one of the metal plants in my own private collection.
The Northallerton Nut and Bolt plant produces fruiting bodies that gradually work their way up threaded stems until ready to pop off the top when ripe.
Predation by Spanner Weevils, which unscrew and eat the fruits before they are ripe, has caused a serious reduction in numbers. It is now registered officially as an endangered species.
The specimen pictured here has been grown in an empty can which helps to provide supplementary aluminium to the roots. If grown in a domestic setting, certain sounds played regularly to the plant will greatly enhance its strength and vitality. By placing a speaker at either side of the specimen (ideally they should be equidistant and no more than two feet away) the sound produced will acoustically create a very favourable growing environment. A scientifically constructed recording of these sounds is available to purchase as a limited edition 3" CDR, or as a free download from the link at the bottom of this page.
Also included in the download is FLORA METALLICUM BRITANNICA, a complete guide to all the thirty known British species of metal plants. It is fully illustrated and contains details of growing conditions, natural history and common pests of these fascinating organisms.
|Threadturnium boltii immediately prior to ejecting one of its fruiting bodies|
|The exact moment that the fruiting body is ejected into the air|