One of our residents is an amateur mycologist and found what is they believe is a lepiota subincarnata, a toxic mushroom, on the Southern end of Sage Hen Way. They got rid of it and started killing the underlying mycelium, but as mycelium can sometimes spread underground and mushroom diffuse through spores they thought it might be worthwhile warning neighbors with children or pets.
The finder has also contacted the San Francisco Mycological Society in hopes of confirming the species of mushroom.
Our thanks to our eagle-eyed resident!