The stem [with a reticulated upper part] ranges from whitish to grayish and can be darker than the cap.
I brought a laundry basket to the site for harvesting. All in all it added up close to 50 pounds, crazy.
It is a choice edible mushroom, and I prefer its firm and aromatic flesh to our endemic Cascade mountain variety of Boletus edulis, which is one of my absolute favorites.
I left the biggest boletes growing, gave a bunch away to friends, but ended up processing boletes for days.
The dryer was running continously for days. Young and medium aged pores I keep, since the pore tissue has the most taste.
However, the oldest pores I collected and put in a watering can and spread the spores in the neighborhood under suitable potential host trees.
Greater Seattle area - photos Oct. 20-24, 2014