Most boletes are found on the ground in wooded areas and at their edges, under conifers (pine, western hemlock, Sitka spruce) and hardwoods (oak, birch, aspen). Springs King Boletes (Boletus rex-veris) grow under Ponderosa pines and white firs at higher elevations of 3,000 feet above sea level and higher.

What trees do boletes grow under?

You're most likely to find king boletes under spruce (Picea), pine (Pinus), birch (Betula), and oak trees (Quercus), but other species in the Boletaceae family — many of which are edible — can be a bit pickier.

Are there any poisonous boletes?

Boletus rubroflammeus mushrooms are poisonous, and can cause gastrointestinal distress if consumed.