Agaricus arvensis, horse mushroom-coarse edible mushroom with a hollow stem and a broad white cap. Agaricus campestris, field mushroom, meadow mushroom-common edible mushroom found naturally in moist open soil; the cultivated mushroom of commerce.garicus campestris, field mushroom, meadow mushroom-common edible mushroom found naturally in moist open soil; the cultivated mushroom of commerce.
Summer Fun on the River ... Regional Parks presents the Russian River Festival, 31 days of outdoor adventure on Sonoma County's summer playground. Throughout July, we will be sharing all the cool ways you can explore and enjoy the Russian River.
1 The drainage basin of the Volga includes most of Western Russia, an area that is home to 11 of the 20 largest cities in Russia.  One of the most fascinating destinations along the river is the city of Yaroslavl, founded in the 11th century. The city is famous for its several cathedrals and beautiful frescoes.