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The Mexican species A. basii is much fleshier than A. jacksonii; and as a result of this difference, the latter has much longer marginal striations than does A. basii and (usually) has an umbo, which is usually lacking in the Mexican species. The most significant difference is in the anatomy of the gills of the two species.
Imagine a pile of oranges. Picture how the rows of oranges overlap. This will give you a feeling for the layers of inflated cells that lie immediately below the spore-bearing cells on the gills of the Caesars (e.g., A. basii) and the Slender Caesars (e.g., A. jacksonii). There are four or five layers of “oranges” in the case of the Caesars and two or three layers in the case of the Slender Caesars. [The layers of cells are called the subhymenium because they support the basidia which form the hymenium—-the spore producing gill surface.] This difference in subhymenia is very consistent with differences in habit between the two groups. This is discussed (and keys are given) in the article on Amanita sect. Caesareae that can be found on the Amanita Studies web site. (A link to the article follows the brief description of sect. Caesareae on the main page of the site:
On the same site, the species page for A. basii provides an outline of a recipe showing how you can improve the flavor of a dish based on A. basii. On the other hand, A. basii can serve as a texture and color highlight in such dishes as scrambled eggs with chipotle chilis.
Be careful in using the Guzmán & Ramírez-Guillén monograph. Because of errors in data collection, errors in sectioning tissues, and lack of taxonomic and biological understanding of the genus Amanita, several species are described twice (receiving two different names). The segregation is often due to small variations in spore size.
basii is apparently much more visually delicious than it is flavorful.
I would love to see some follow-up on tuza, tho…the white edible Mexican caesarea, possibly pictured on MO by our Mexican myco-correspondent Benito. Link here: http://mushroomobserver.org/21222?search_seq=590086
they look identical to the A. jacksonii that I find here in the states, neato.
Created: 2009-07-17 00:16:49 CDT (-0400)
Last modified: 2009-07-17 00:16:49 CDT (-0400)
Viewed: 213 times, last viewed: 2016-11-07 11:36:00 CST (-0500)