1918] 
BURT—THELEPHORACEAE OF NORTH AMERICA. X 307 
chaete formosa Léveillé, Ann. Sci. Nat. Bot. III. 5 : 151. 1846. 
—An Thelephora speciosa Fries, Linnaea 5 : 525. 1830? 
Fructifications with several to many pilei borne on very 
short branches of a common central stem at or near its apex; 
stem cylindric, velutinous with setae, hazel to Brussels-brown; 
pilei coriaceous, thin, expanded, drying strongly inrolled, even 
or sometimes rugose, silky and antique brown when young, 
finally glabrous except for setae which are scattered over the 
upper surface and more abundant towards the stem, bister, 
and sometimes concentrically zonate with narrow dark zones 
near the margin; hymenium a little darker than the upper 
surface, Prout’s brown to Mars brown, abundantly and con- 
spicuously setulose; in structure 200—500 д thick, composed 
of a setigerous layer up to 150 yw thick and of a hyphal 
layer constituting the remainder and not bordered on either 
side by a dense, dark zone; setae 90-1509-15 и, emerging 
up to 60 џ, tapering upward from the base, starting from all 
parts of the setigerous layer; spores hyaline, even, 5-54 
4-43 y. 
Fructifications 3-15 em. high, 14-3 em. broad; individual 
pilei 1-14 cm. long, 1-3 em. broad; stem 2-14 em. long, 2-3 
mm. in diameter in dried specimens not cited under H. formosa 
on a following page. 
On roots of trees and among leaves in thick woods. West 
Indies and Mexico to Brazil. October to March. 
H. damaecornis exhibits wide variation in the dimensions 
of its fruetifieations and in the number of pilei which are 
borne on the central stem; the short branches of the latter 
are somewhat flattened in radial planes with respect to the 
central stem if so many pilei are present that some are borne 
along the sides of the stem below the terminal cluster. Where 
only four pilei are present in a symmetrical terminal cluster, 
there is bifurcation of the main stem into two flattened 
branches, and of these again into the more broadly flattened 
bases of the individual pilei. There is often a curious twist- 
ing of the end of the branch and base of the pileus through 
an angle of 90 degrees to bring the plane of the pileus dorsi- 
ventral, if we may compare it with a leaf. In this connection, 
