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This study suggested that the differences between species based on spores was literally microscopic. The overlap includes all species known. Ganoderma lucidum is frequently grown in high CO2 locales to create the “antler” form: something that might also occur on G. oregonense.
I cannot speak to the medicinal properties of one species vs. another. I know that here in Oregon, G. oregonense is often found in health-food stores as a dietary additive touted to strengthen the immune system. It well may be so.
Certainly both G. oregonense and G. tsugae, both of which I have cultivated, are both easily grown and persist for considerable time in nature. In Chinese pharmocopeia, the longer a fungus perists without breakdown in nature, the more likely it is to have medicinal properties. G. oregonense can persist for years if not decades, each year growing another small layer of pores on the undersurface of the last year’s growth.
Based on the same principals, Fomitopsis officinalis (Quinine conk) and Oxyporus (now Bridgeoporus) nobilissimus must be considered as the top of the medicinal food chain, as they are certainly the largest conks and the longest-lived that I have ever seen.
I’ve long been wondering to what extent our Oregon Reishi can compete with G. lucidum in medicinal value. I can only find very little specifically addressing the properties of G. oregonense either alone or in comparison to any other Ganoderma. There are figures such as the entry on Stamets’ Cross-Index of Mushrooms and Targeted Therapeutic Effects which lists G. oregonense as having about half of the beneficial properties as the traditional Reishi, but no citations are given. I would imagine that Stamets’ two literature recommendations from Growing Gourmet and Medicinal Mushrooms :
(“Reishi and Ganoderma lucidum that grow in Europe and America: Their Differences,” -R. Imazeki, 1937)
(“North American Polypores: Vol. I & II,” -Gilbertson and Ryvarden, 1987)
are either outdated or do not provide an adequate treatment of G. oregonense (I believe Imazeki’s paper only exists in Japanese). In addition, many a text is suggesting that differentiations between G. curtisii, G. tsugae, G. oregonense and G. lucidum may only be substrate deep.
Has there been anything approaching a final word on G. oregonense, and if so, how does it stack up?
Created: 2008-08-12 22:48:08 CEST (+0200)
Last modified: 2008-08-12 22:48:08 CEST (+0200)
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