u/arcticprairiedog

I was mowing in the back yard and my dog had mushroom running around with it in his mouth. Didn’t see him chewing on it just had the mushroom cap in his mouth. The mushroom was growing under the mower in the dark from dirt. The mushroom has a black top that was about 4-4.5in in diameter, 4-5in tall with white underside and a stem about an inch in diameter. Haven’t really brushed up on my mycology so I have no clue what it is or if it’s poisonous . Can you help identify it? Also in North Texas. Thanks