“Of the ‘_Merisma_’ group of _Polypores_, having already tried _P. frondosus_, _P. confluens_, and _P. sulfureus_, I ventured, after some hesitation, and with more than usual caution, to test the virtues of a new American species (_P. Berkelei_, Fr.), notwithstanding the intense pungency of the raw material, which bites as fiercely as _Lactarius piperatus_. When young, and before the pores are visible, the substance is quite crisp and brittle, and in this state I have eaten it with impunity and with satisfaction, its pungency being all dissipated by stewing. I do not, however, deem it comparable with _P. confluens_, which is rather a favourite with me, as it is with some others to whom I have introduced it. _P. sulfureus_ is just tolerable; safe, but not to be coveted when one can get better. When I say safe, I mean not poisonous. I cannot recommend it as a diet for weak stomachs, which should be said of some other fungi of similar texture. I am here reminded of an experience I had three or four years ago with this species, which would have greatly alarmed me had it happened at an earlier date in my experiments, and which would probably have deterred anyone unused to this kind of diet from ever indulging in it again. I had a sumptuous dish of it on my supper-table, of which most of my family, as well as a guest staying with us, partook very freely. During the night I became exceedingly sick, and was not relieved until relieved of my supper. My first thought on the accession of my illness was of _Polyporus sulfureus_; but as I remembered that inflammation was one of the symptoms of fungus-poisoning, and I could detect no indications of this in my case, I soon dismissed the rising fear, did not send for the doctor, nor take any remedy. Others, who had partaken of the fungus more freely than myself were not at all affected; and I presume my sickness was no more induced by the _Polyporus_ than by the bread and butter I had eaten. And yet, had I alone partaken of the dish, or had one or two others been affected in like manner, doubtless the night attack would have been very confidently attributed by some to the mushroom; or had this been my first trial of that article, possibly I might ever after have regarded it with suspicion. I learned a few days afterwards from one of our physicians, that this kind of sickness was then somewhat prevalent in the community, and could be attributed to no known cause. For the credit of this species, therefore, we were fortunately able to distinguish the _post hoc_ from the _propter hoc_.