134 
Mycologia 
Peridermium fusiforme Arth. & Kern, Bull. Torrey Club 33: 421. 
1906. 
Peridermium mexicanum Arth. & Kern, Bull. Torrey Club 33 : 
422. 1906. 
Peridermium globosum Arth. & Kern, Bull. Torrey Club 33 : 424. 
1906. 
0. Pycnia indefinitely spread out over the surface of swellings 
similar to those on which the aecia appear, the overlying cortical 
tissues with a rather even surface, 40-50 fi high ; pycniospores 
very numerous, globose, 1.5-2 fi. 
1. Aecia appearing on globoid swellings 5-25 cm. across, or on 
fusiform swellings 2-6 cm. by 5-30 cm. long, usually encircling the 
comparatively small branches, often causing swollen areas only 
partially encircling the larger branches or main trunks, individual 
sori elongate or tortuous, sometimes distinct but often confluent 
so as to appear cerebroid ; peridia circumscissile, soon falling away, 
sometimes in flakes or sheets ; aeciospores obovate or ellipsoid, 
15-24x23-33 /x; wall 2.5-4 fj. thick, rather coarsely verrucose, 
with a smooth area at base often extending up one side. 
On Pinus contorta Dough, Alaska ( T release 66’/). 
On Pinus Banksiana Lamb. ( P . divaricata Auct.), Connecticut 
(communicated by Clinton) ; Michigan ( Wheeler ) ; Wisconsin 
(Lone Rock, May 31, 1890, Goff, erroneously listed in former 
paper, Bull. Torrey Club 33: 424, as on “Pinus Strobus,” same 
locality, May 29, 1912, Davis). 
On Pinus echinata Mill. (P. mitis Michx.), Arkansas ( Bethel , 
von Schrenk). 
On Pinus radiata Don. (P. insignis Dough), California (Bias- 
dale, Fawcett, Bethel). 
On Pinus Murrayarta Oreg. Com., California (Yosemite Val- 
ley, May 29, 1895, Blasdale) ; Colorado (Bald Mt., Central City, 
July 4, 1908, Lake Eldora, July 21, 1910, Aug. 5, 1911, June 30, 
1912, Silver Plume, Dec. 24, 1906, Tolland, July 30, 1906, Aug. 
15, 1906 in Barth, Fungi Columb. 2243, all by Bethel; Tolland, 
May 18, 1908, Kern; Long's Peak Inn, Estes Park, Aug. 7, 1908, 
Clements) ; Montana (Libbey, Oct. 15, 1911, Wier 3/) ; the Colo- 
rado and Montana specimens are included here on morphological 
grounds although some doubt is thrown upon this disposition by 
the failure up to this time to find the alternate stage within this 
geographical range. 
