106 REVISION OF THE NoRTH AMERICAN HYDNACEAE 
curiously concurred in regarding them as constituting a distinct 
genus. 
; The genus Sisfotrema was established by Persoon оп 5. con- 
fluens as the type. The only character by which this genus ap- 
pears to be separated from Hydnum is that of the flattened teeth, 
and considering that this character is frequently present in /7. 
repandum, it seems to be a wholly insufficient ground for the 
separation of the genus. This generic name is older than 
Hy pothele, 
Synopsis of the Species 
Spores small, less than би in diameter; the entire plant generally white to cream 
colored. 
Pileus viscid, at least when young, as shown by adhering leaves. 
Plants large, 5-13 cm. wide, not confluent ; stem stout; pileus not deeply 
pressed. I. 27. albo-magnum. 
Plants small, less than 3 cm. wide, confluent ; stem slender; pileus more or 
form 
less infundibuli 6. H. subl padlocks 
Pileus dry; plant small, jen than 6 cm. wide, turning gen to brown when cut 
or bruised. H. albidum. 
Spores large, more than би in diameter ; plant yellowish buf or reddish. 
Plants н yellow when cut or bruised, generally caespitose ; stem as long as 
t т.с 
of Ше pileus. 4. H. caespitosum. 
ane not арны yellow when bruised, solitary or gregarious, rarely caespitose ; 
stems usually shorter than the width of the pileus 
Teeth вати half way down the stem ; н somewhat tough 
H. washingtonianum. 
Teeth scarcely decurrent ; flesh brittle. 3. H. repandum. 
— 
Нурмом ALBO-MAGNUM Banker, Bull. Torrey Club 28: 207. 
1901 
А low, broad, fleshy plant usually pure white throughout 
though sometimes lightly tinted, turning yellowish in drying. 
Pileus uneven, repand, viscid when young, probably subglabrous 
in age, reaching 10 cm. or more in width ; flesh white, brittle, and 
mealy ; stem short, thick, central, or excentric, often with bulbous 
base, its length not more than half the width of the pileus, the plant 
often appearing nearly sessile ; teeth white, slender, crowded, about 
3 to one millimeter, acute нон bristle pointed, 2-4 mm. long, sub- 
decurrent ; spores white or hyaline, oblong-ovate, obliquely apic- 
ulate, smooth, with one or more small guttulae, small, 3.5-4 by 
5.5-7 М; taste mild, somewhat mealy. 
Has.: In mixed woods. Nov.—Jan. 
Кахсе: Alabama, Earle. 
