Catathelasma imperiale

The imperial cap, Catathelasma imperiale (Fr.) Singer.

Synonyms

Agaricus imperialis Fr.
Armillaria imperialis (Fr.) Quél.
Biannularia imperialis (Fr.) Beck
  Pilz- und Kräuterfreund 5(5-8): 231 (1922)
Catathelasma imperialis

Common names

Commander
Imperial cap

Description

Cap: 10-40 cm diameter; convex to obtuse, expanding to flat or humped; margin incurved initially; surface viscid when young, later dry and cracking; yellowish-brown to olive brown initially, darkening and becoming more grayish brown with age; flesh thick and tapering gradually to margin, hard, white.
Gills: decurrent, initially narrow, often forked, dingy yellowish to pale olive-gray.
Stem: 12-18 long x 5-8 cm thick, rooting with a tapered base, sheathed with a dingy yellowish brown veil which forms a double ring; upper ring membranous and streaked on upper surface, lower ring gelatinous.
Spore print: white.
Spores: smooth, amyloid, subfusoid to subcylindric, 11-15 x 4-6 µm.
Habitat: solitary to scattered on soil in coniferous forests; late summer and fall.
Odor and taste: strongly farinaceous.
Edibility: edible.

Description adapted from McKnight et al., 1998, p. 137.

Bioactive compounds

Eight ergostane-type sterols and three of their derivatives (one mono-linoleate and two mono-glucosides), were isolated from the ethyl acetate soluble fraction of Catathelasma imperiale (Yang et al., 2003). Two of the sterols were previously unknown:  22E, 24R-ergosta-7, 22-diene-3β, 5α-diol-6β-linoleate and 22E, 24R-ergosta-7, 22-diene-3β, 5β, 6α-triol. These compounds have an uncommon cis-fused A/B ring.

Medicinal properties

Antitumor effects

Polysaccharides extracted from the mycelial culture of C. imperiale and administered intraperitoneally into white mice at a dosage of 300 mg/kg inhibited the growth of both Sarcoma 180 and Ehrlich solid cancers by 90% (Ohtsuka et al., 1973).

The Truth About Medicinal Mushrooms

Medicinal Mushrooms

Medicinal Mushrooms are great. One of the few supplements I feel confident taking that actually has benefits. Most of the supplement industry is selling you on placebo, but I don't feel that's the case with medicinal mushrooms. HOWEVER; a large portion of the Mushroom Industry is corrupt. ​Come read this article if you want to find out the Dirty Secret in the Mushroom Industry and how to choose an Authentic Mushroom Supplement.

Links

Mushroom Expert
C. imperiale on a 1997 Slovak postage stamp

References

Hutchion LJ.
Host range geographical distribution and probable ecological status of Catathelasma imperiale in North America.
Mycologia. 1992 84(3):472-5.
JSTOR preview

McKnight KH, McKnight VB, Peterson T. 1998.
A Field Guide to Mushrooms: North America.
HMCo Field Guides. 448 pp.

Ohtsuka S, Ueno S, Yoshikumi C, Hirose F, Ohmura Y, Wada T, Fujii T, Takahashi E.
Polysaccharides having an anticarcinogenic effect and a method of producing them from species of Basidiomycetes.
UK Patent 1331513, 26 September 1973.

Yang SP, Xu J, Yue JM.
Sterols from the fungus Catathelasma imperiale.
Chinese J Chem. 2003 21(10):1390-4.

Leave a Comment

Advertisements