Ig10] RIDDLE—STEREOCAULON 289 
squamules poorly developed, mostly granular.—The species of this 
section show resemblance to Pilophorus. 
KoERBER’s name “Cereolus”’ for this section must be shandoank with 
the exclusion of the Lichen cereolus of AcHartus from the genus (see dis- 
cussion under S. pileatum). 
I. STEREOCAULON PILEATUM Ach. 
S. pileatum Ach. Lich. Univ. p. 582. 1810. 
S. condensatum Laurer in Fries Lich. Eu. p. 203, in part. ast} and in 
Tuck. Syn. Lich. New Eng. p. 46, in part. 184 
S. cereolus Schaerer Enum. Crit. Lich. Eu. p. ee 1850; not Ach. Meth. 
Pp. 316. 1803. 
S. cereolinum Koerber Syst. Lich. Germ. (1855) p. 14. 1855; not Ach. 
Syn. p. 285. 1814. 
Primary thallus persistent, closely adnate to the substratum, 
* formed of granular squamules which tend to become coralline; 
podetia short, mostly under 1 cm., and simple or nearly so, glabrous, 
with scattered coralline-granular squamules; apothecia terminal, 
or often absent and the podetia then ending in a mass of white 
soredia; spores 16.5-29%3.5-5#, average 21.4X3.9#, with 
blunt ends; cephalodia of the type of S. paschale (g.v.).—Growing 
on rocks. 
SPECIMENS EXAMINED 
Europe: Stenh. Lich. Suec. no. 85; Moug. and Nestl. no. 947; Koerb. 
Lich. sel. Germ. no. 271. 
Canapa: Newfoundland, Waghorne 1893, as S. nanodes (Hb. Eckfeldt); 
Anticosti Is., Macoun Aug. 24, 1883 (Can); Cape Breton Is., Macoun July 22, 
1898 tone Nova Scotia, Macoun 1883 stpans aint (BSNH); Grand 
Manan Is., Willey (BSNH). 
wae : Mt. Desert, J. W. Eckfeldt 1888 (Mt. D): Rockland, G. K. Merrill 
New Hampsurre: White Mts., Tuckerman Lich. Exs. no. 113 in part; 
also Tuckerman in Herb.; Bald Mt., W. G. Farlow Sept. 1905 (H); Chocorua, 
W.G. Farlow Sept. 1907 (A); FitcwiBiam, R. H. Howe, Jr., Aug. 6, 1909 (R). 
VERMONT: Mt. Mansfield, C. G. Pringle no. 197 (BSNH); Willoughby, 
G. G. Kennedy July 28, 1898 (H). ° 
Massacuusetts: Chelmsford and Salem, J. L. Russell 1850 (Tuck); Con- 
cord, R. H. Howe, Jr.(Th); Ipswich, Oakes and Tuckerman Nov. 1842 (Tuck) ; 
New Bedford, Willey 1881 (Tuck). 
New York: Adirondack Mts., L. W. Riddle Aug. 1908 (R). 
This is the only species treated in this paper of which the synonymy is 
