Another species of inkcap. Although it is fairly common, and reasonably conspicuous, it does not have a generally accepted English name. Surprisingly few species of fungi do.
This recently emerged specimen of Coprinus comatus shows the beginning of the cracking of the cap covering which will eventually become the “shagginess” when it is more fully-grown.
This pattern is seen in the more developed, and parasol-shaped, fruiting body below.