SECTION AMAURODERMUS. 



accord with this figure. The fresh plant when bruised turns dark 

 and herbarium specimens are usually black. 



RAMOSIL Bresadola endorses this as a synonym for rugosus and I think 

 it is a slender form. The spores and other characters are in the main the s.uiu 

 but the plants are more slender and the context thinner. It occurs over the 

 same regions as rugosus and also the Philippines. 



RUDIS (Fig. 403). Pileus strongly rugulose with mat, dull sur- 

 face, minutely velutinate, light in color. Stems with olive, velutinate 

 surface. Pores medium, with thin walls. Context light cinnamon. 

 Spores globose, 9-12, with thick walls, minutely rough. The type of 

 rudis I have not found, but there are abundant collections so named 

 by Berkeley from Australia, where it seems to be common. It is close 

 (too close perhaps) to rugosus of the East, but seems to be more 

 rugulose, has larger pores and spores, and when mature retains its 

 color. Young specimens, however, turn black in drying. 



SPRUCEI (Fig. 404). (Change of Porothelium rugosum of 

 Berkeley.) Pileus dark brown, rugulose, with narrow, concentric 

 zones. Surface mat. Stipe pleuropodal with mat surface, concolorous. 

 Pores and context pale, the pore mouths pustular, hence put in the 

 genus Porothelium (sic) when originally named. Spores globose, 8 

 mic., smooth, very pale. Known only from the (abundant) types col- 

 lected by Spruce in Brazil. It departs from others of this section in 

 its spores and context being paler. 



VARIABILIS (Fig. 405). Pileus from 2 to 6 cm. broad and 

 about 5 mm. thick, with a lateral, slender stipe. Color pale alutaceous, 

 both pileus and context. Surface dull. Spores 9x 12, oval, smooth. 

 This is quite a distinct species, characterized by its pale color and oval 

 spores. It is known from two collections (Nos. 57 and 183 part) made 

 by Spruce in Brazil. It is badly named for it is quite uniform, but there 

 was confused (and figured) with it quite a different plant (cfr. Poly- 

 porus unilaterus, in the next section). 



CALCIGENUS. Pileus about an inch in diameter, with a red- 

 dish brown, laccate crust. Context pale olive. Stem mesopodal, slen- 

 der, with brown, mat surface. Spores abundant, oval, large, 12x16. 

 deeply colored, smooth. Quite distinct but known from a single speci- 

 men at Kew from Spruce. Brazil. 



RIYULOSUS. Pileus glabrous, rugulose (not rivulose, I think), 

 reddish brown with paler margin. Stem pleuropodal. branched, some- 

 times bearing two pilei, with a smooth, dark reddish crust. Context 

 thin, ligneous, pale cinnamon. Pores minute, pale but darker than the 

 context. Spores globose, 14 mic. faintly reticulate, with thick walls 

 Known only from the type in the Museum at Paris from Java. It has 

 the general appearance of a Ganodermus, but from its spore characters 

 belongs to Amaurodermus. 



2 III 



