I happened to have the camera with me when I ran to the store, and lo and behold:
|...and Eringe, too!|
Just like that--growing out of the containers. They hadn't been cut off and packaged yet, so, naturally, I bought some of each (even though I have no immediate menu plans that involve shimeji or eringe.....hmmmm....thinking...). 98 Yen (less than 98cents American at the current exchange rate) was quite a bargain to buy mushrooms right out of the growing container (which I didn't get to keep--rats!).
I use shimeji frequently in soup or ginger pork and whatnot, but I love Eringe--the way it looks like a little family, see:
|Awww-Papa, Mama, Big Brother, Little Brother, and Baby Sister!|
....The Mushroom Guys!