A mushroom is a fungus (from the Greek word sphongos, meaning "sponge").

Fun Facts: 
Mushrooms are very difficult to grow. Intensive labor is needed to produce a high-quality, consistent crop.
Today mushroom farms are highly technical operations, they use extensive computerized systems to monitor each point in production.
Over 38,000 mushroom varieties exist. Some are highly toxic and some are edible.
Popular edible varieties include: White Button, Portabella, Oyster, Enoki, Shitake, Crimini, Lobster, Porcini, and Morels.
California, January, February, March, April, May, June, July, August, September, October, November

Who Grows It

Nutrition Facts White, raw
Serving Size: 1/2 cup (whole)
Amount Per Serving  
Calories: 11  
  % Daily Value*
Total Fat: 0.16g 0%
Cholesterol: 0mg 0%
Sodium: 2mg 0.08%
Total Carbohydrate: 1.57g 0.52%
     Dietary Fiber: 0.5 0% 
     Sugars: 0.79g  
Protein: 1.48g  
Vitamin A 0% Vitamin C 1.67%
Calcium 0.1% Iron 1.33%
*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

Source: USDA National Nutrient Database