40 MurrRILL: POLYPORACEAE OF NORTH AMERICA 
October, 1901. It was found in considerable quantity growing 
on decaying wood. There is also in the herbarium of the New 
York Botanical Garden another good collection of this species 
from Porto Rico made by Mr. and Mrs. A. A. Heller in March, 
1899. It also grew on dead wood. This latter collection, how- 
ever, is not considered typical. 
20. PoLyporus caupIcINuS (Scop.) Murrill 
Boletus caudicinus Scop. Fl. Carn. ed. 2, 2: 469. 1772. 
Boletus Juglandis Schaeff. Fung. 3: 75. pl. ror—102. _1774- 
Boletus squamosus Huds. Fl. Angl. 614. 1778. 
Polyporus Uli Paul. Icon. Champ. p/. 73. 1793. 
Polyporus squamosus Fr, Syst. 1: 343. 1821. 
Polyporus caudicinus Murrill, Jour. Myc. g: 89. 1903. 
Exsicc.: France, Roumeguére 2706, 2707, 3403; Germany, 
Krieger 860, Sydow 212, Magnus, Murrill; Sweden, Murrill; 
England, Murrill ; Canada, Dearness ; Connecticut, Underwood. 
This species is the largest of the genus and occurs in very con- 
spicuous clusters on the trunks of injured deciduous trees in 
Europe and America. In London and in some of the cities of 
Germany I have found it especially abundant on elms, maples, 
horse chestnuts and other shade trees. It is at present compara- 
tively rare in America and need not here be seriously considered 
from an economic standpoint for some years to come. 
Scopoli’s description is not so clear and definite as might be 
desired, but in the first variety described there can be no question 
as to the plant he had in mind, for he speaks of it as multiple, 
lobed, fleshy, large, growing on the trunks of trees, variegated 
above with darker spots, light-colored beneath, with large polyg- 
onal pores. The large pores connect it with the genus /Hexa- 
gona, but its general structure and habit are those of Polyporus. 
Young plants collected in Connecticut, by Underwood, in May, 
showed very short favoloid tubes with thin toothed dissepiments, 
a milk-white fleshy-tough context and a scaly pileus differing 
little in color from that of the mature plant. The odor of the — | 
fresh plant is strong and somewhat mealy ; the base of the stipe 
is clothed with short dark-brown or black velvety tomentum. It _ 
is quite possible that in this species we have modifications pro-_ d | 
