The historic elms of Boston Common have borne copious crops of this well-known and easily distinguished species from time immemorial. Every fall, about the first of September, if the season is favorable, later if not, copious crops appear decorating the trunks, and branches, sometimes at a height of thirty or forty feet. Growth takes place where branches have broken off or the trees have been wounded from other causes. They occur very generally on elms in the outlying districts of the city, but are rare in the country, seeming to be distinctly urban in their tastes. No damage is apparent from their growth. Immediately in the rear of Independence Hall, Philadelphia, a fine cluster appears with equal autumnal regularity. Though the elm tree is the chosen habitat of this fungus, it is little less select in its choice than other members of its genus. When young and small P. ulmarius is tender and of acceptable flavor. The stems and centers of older specimens should be cut away, and the tender parts of the caps, only, used. =P. tessula´tus= Bull.—_tessela_, a small cube for pavement. =Pileus= _becoming pale-tawny_, horizontal, compactly fleshy, convex then plane, and in a form which is somewhat lateral depressed behind, irregular, even, smooth, _variegated_ with round and hexagonal paler _spots_. =Flesh= thick, white. =Stem= short, 1 in. or little more long, solid, _compact_, _equal_ or attenuated at the base, very excentric, curved-ascending, even, _smooth_, white. =Gills= _sinuate behind_, uncinato-adnate, thin, _crowded_, white or becoming yellow. Solitary; according to some cespitose. The pileus is not cracked in a tessellated manner, as one might easily imagine from the name, but variegated with spots. Smaller than A. ulmarius (to which it is too closely allied), but almost more compact, with a smell of new meal. On trunks. _Stevenson._ North Carolina, _Schweinitz_. Edible. _Curtis._ Edible. _Cordier._ On specimens growing cespitose and singly, found at Haddonfield, N.J. September, 1895, on trunk of apple tree, and at Eagle’s Mere, Pa., singly on sugar maple, August, 1898, the margin of caps were beautifully marked, but not cracked. In quality it is better than P. ulmarius. =P. subpalma´tus= Fr.—_sub_ and _palma_, a palm. =Pileus= 3–5 in. across. =Flesh= thick, soft, variegated; convex then more or less flattened, irregularly circular, obtuse, wrinkled, smooth, with a gelatinous cuticle, rufescent. =Stem= excentric or almost lateral, but the pileus is always marginate behind, fibrillose, short, equal, flesh fibrous, soft. =Gills= adnate, 3–4 lines broad, crowded, joined behind, dingy. _Massee._ On old trunks, squared timber, etc. Very remarkable for having the flesh variegated as in Fistulina hepatica. Pileus, especially when young, covered with a viscid pellicle. _Fr._ =Spores= minutely echinulate, nearly globose, 5.6×7µ _Morgan_. Ohio, _Morgan_; Wisconsin, _Bundy_.