76 BULLETIN OF THE NEW YORK STATE MUSEUM 
Stemulhollowient  Noycepseiy cee eee bilo Meee nag veya eh carted B. cavipes 
BUH 8) LATCSYO) | U6 li Baa ME ESN al a OTe a tian CU cue lan MMERUN ESI etre dG ys I 
ig Siusian lendenell Creelecimddloy sate oinad Sood oborodaoddcds sc aie lN oas B. porosus 
I SLEM CEMbralisy fair aie oe Ua ani aie eaclc aL rc te ren ae aR 2 
Zu rnleusipalesyellowsrsilllkayayes sme ssc tes Sere oe ame B. decipiens 
2Eleus ed omadoniediwithinediscaleseae smear neater an 3 
ie pUbe US Heme Clear cave ned Oat tala go steals 2 chen caloys constntcics hale fore eee ee ee B. paluster 
Si ileus SOOnmned-SquamOse sre ais) vee ase ei eae eee B. pictus 
Boletinus cavipes Katcues. 
HoOLLOW-STEMMED BOLETINUS 
Icon. Sel. Hym. Hung. p. 52, tab. 31. Boletus cavipes Opat. Comm. p. 11 
Boletus ‘subtomentosus Report 23, p. 131. Boletus ampliporus Rep. 26, p. 67 
Pileus broadly convex, rather tough, flexible, soft, sub- 
umbonate, fibrillose-squamulose, tawny-brown, sometimes 
tinged with reddish or purplish, flesh yellowish; tubes 
slightly decurrent, at first pale yellow, then darker and 
tinged with green, becoming dingy-ochraceous with age; 
stem equal or slightly tapering upward, somewhat fibrillose 
or floccose, slightly annulate, o/low, tawny-brown or 
-yellowish-brown, yellowish at the top and marked by the 
decurrent dissepiments of the tubes, white within; veil 
whitish, partly adhering to the margin of the pileus, soon 
disappearing ; spores .0003 to .0004 inch long, .o0016 broad. 
Pileus 1.5 to 4 inches broad; stem 1.5 to 3 in. long, 3 to 
6 lines thick. Swamps and damp mossy ground under or 
near tamarack trees. New York, Peck. New England, 
Frost. 
The pileus is clothed with a fibrillose tomentum which 
becomes more or less united into floccose tufts or scales. 
The umbo is not always present and is generally small. 
The young stem may sometimes be stuffed, but if so, it 
soon becomes hollow, though the cavity is irregular. The 
freshly shed spores have a greenish-yellow or olivaceous hue, 
but in time they assume a pale or yellowish-ochraceous hue. 
This species is apparently northern in its range. It loves 
cold sphagnous swamps in mountainous regions. 
