Portabella mushrooms

[Tom Volk]

Greetings.  I agree with the other posters on this subject. 
 Portabella mushrooms are grown from a brown strain of 
Agaricus bisporus (a.k.a A.brunnescens.)  

It is interesting (to me, anyway) that "Crimini" mushrooms 
can also be grown from the same *strain* (not just the same 
species) of A.bisporus that yields portabella, but under 
somewhat different conditions and (obviously) to a less 
developed stage.
---Tom

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Tom Volk                                     (000)
Center for Forest Mycology Research,        (00000)
Forest Products Lab, Madison Wisconsin       (000)
& UW- Madison Dept. of Botany                (000)
tjvolk at facstaff.wisc.edu                      | |
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http://www.wisc.edu/botany/fungi/volkmyco.html