i6o MINNESOTA MUSHROOMS 



perennial, growing for several years 



pungent, sharp, biting 



sclerotium, a hard black mass of fungus threads 



sinuate, Avith the gill notched where it joins the stem 



striate, marked with streaks or lines 



subglobose, more or less globe-like 



superior, above the middle 



trama, the middle layer of a gill 



umbilicate, sunken, like a navel 



umbo, a raised disk or boss 



umbonate, with a disk or boss 



veil, a membrane covering the gills or the cap 



viscid, sticky, covered with glue 



volva, a cup or sheath at the base of the stem 



