Notes and Rrtef Articles 
187 
moist, slightly viscid when very young, hygrophanous, bay be- 
coming fulvous or isabelline according to age and moisture condi- 
tions, glabrous, smooth on the umbo, rugose and folded on the 
broad rim when in the hat-like stage ; margin entire to lobed, not 
projecting, smooth, entirely free from fibrils or remnants of a 
veil, incurved when young, marked with a water-soaked, dark- 
fulvous zone about 3 mm. broad ; context white or slightly yel- 
lowish, very thick at the center and very thin toward the margin, 
the odor and taste resembling that of the common mushroom ;■ 
lamellae squarely adnate, without sinus or decurrent tooth, plane, 
somewhat semicircular in shape, at least when young, inserted, 
fuliginous, gray or whitish on the edges, not distinctly marbled, 
purplish-fuliginous when viewed from below, of medium dis- 
tance, about 8 mm. broad ; spores ellipsoid or ovoid, somewhat 
pointed or narrowed at both ends, black, smooth, opaque, 11-13 
X 7-8.5 fi ; cystidia not found ; stipe thick, fleshy, sometimes equal 
but often much enlarged upward, whitish or rosy-isabelline, 
not polished, longitudinally striate at the apex, whitish, pruinose 
above, whitish-tomentose below, conspicuously hollow, 6-10 cm. 
long, 5-10 mm. thick. 
Type collected by Mrs. Rufus Hatch in her mushroom beds at 
Pelham Manor, New York, May i, 1916 (herb. N. Y. Bot. Gard.). 
At first sight, the specimens suggested the genus Psilocybe, 
since the gills were purplish-brown and the margin did not pro- 
ject beyond them; but the spore-print proved to be black and 
the spores typically those of the genus Panaeoliis. The species 
is aberrant and might be placed in a different group or subgroup 
with species like Panaeoliis digressus Peck and Panaeoliis acidus 
Sumstine. Other species of Panaeoliis have been considered 
somewhat poisonous, but apparently none have exhibited such 
poisonous properties as this. 
W. A. Murrill. 
