This mushroom is known as the "Old Man of the Woods". It will get darker as it ages until it is mostly black.
Note the red pores on this bolete. Also, the stem looks like it started to diverge at the top.
The bitter bolete, Tylopilus felleus.
The yellow fungi here (with cap) is the parasitic bolete. It grows on the fruitbodies of Scleroderma, the earthball fungi.
The bolete Tylopilus rubrogrunneus.
Strobilomyces strobilaceus has these distinctive tufts on the cap.
This is Strobilomyces strobilaceus, the "Old Man of the Woods".
This is a King Bolete.
Note the pore shape on this Suillus.
Polyporus alveolaris, the hickory stick polypore.
This is the spore bearing surface of the ash bolete.