REVISION OF THE NoRTH AMERICAN HYDNACEAE 127 
doubt whether S. ochraceum and the present species can be main- 
tained as specifically distinct. Young and resupinate forms of the 
two species are practically indistinguishable, and the fragments 
commonly sent in by collectors for identification will frequently puz- 
zle the expert to decide to which species they should be referred ; 
while many forms are found so unlike either as to render it impos- 
sible to assign them to one rather than the other. The latter might 
be regarded as distinct species if there were any evidence that their 
distinguishing characters were constant. Nevertheless, in mature 
well developed plants, the contrast in the character of the pilei is 
very marked and seems to warrant the recognition of at least two 
distinct but closely related species. 
3. Steccherinum Morgani sp. nov. 
Plant pileate, sessile, gregarious, subimbricate, distinct ; pileus 
dimidiate to subflabelliform, horizontal, thin, about two millimeters 
thinning out to the margin, thickened at point of attachment to 5 
mm., 3.5-6 cm. wide, 3.5—4 cm. long; surface subradiately tomen- 
tose or pubescent, uneven toward center, sulcate-zonate toward 
margin, drab to pale buff; margin smooth, uneven, straight, thin, 
acute, substerile ; substance fibrous, tough, subflexible when dry, 
light buff; teeth short, straight, compressed, forked or fimbriate, 
umber to tawny in side view but the hymenium between the teeth 
is light buff, т mm. long shortening to the margin, 0.17-0.20 mm. 
wide, 3 and 4 to one millimeter. 
Ohio, Morgan. 
The above description is drawn up from dry material from Mr. 
A. P. Morgan. Morgan referred the plant to Hydnum glabrescens 
B. & R. but comparison with the type of that species convinces me 
that they are not the same. 
4. Steccherinum reniforme (B. & C.) 
Hydnum reniforme В. & С. Jour. Linn. Soc. 10: 325. 1869. 
Hydnum glabrescens Berk. & Rav. Grevillea 1: 07. 1873. 
Plants pileate, subsessile, gregarious but not confluent ; pileus 
reniform to orbicular, sometimes subcuneiform, horizontal, sub- 
pendent, 3 mm. to 3 cm. wide, 2 cm. long, less than 1 mm. thick ; 
surface even, sulcate zonate, subpubescent, color chiefly light 
umber or isabelline, sometimes alternating toward the margin with 
cream-colored zones; margin cream-colored, thin, even, entire 
