SECTION AMAURODERMUS. 



c. STIPE WITH DULL, MINUTELY VELUTINATE SURFACE. 



UNILATERUS (Fig. 413). Pileus small (i-\y 2 cm.) reddish 

 brown, dull surface, unilaterally attached. Stem slender (i l / 2 -2 mm. x 

 7-9 cm.) with dull surface. Pores minute, 5-8 mm. deep, pale cinna- 

 mon with white mouths. Spores large, globose (or subglobose) 20 

 mic., distinctly rough. The types at Kew (Spruce, No. 207) from 

 llrazil were named by Berkeley in manuscript "ellipticus," but ulu-n 

 published they were included and figured as part of Polyporus vari- 

 abilis. They differ from variabilis not only in different stem insertion 

 but have very different spores. 



FASCICULATUS. Pileus unicolorous, pale fauve in some speci- 

 mens, fuliginous in others, marked with prominent, raised, narrow, 

 concentric zones. Context cinnamon. Stem with dull, velutinate sur- 

 face, light brown color. Pores minute, 3-4 mm. deep, darker color 

 than the context, the mouths stuffed, isabelline. Spores subglobose. 

 12-14. strongly rough, pale colored. A strongly marked species known 

 only from two collections, both from Congo, Africa. The original is 

 in the herbarium of Patouillard at Paris, others sent me by Edouard 

 Luja, Congo Beige. A character of both of these collections is that 

 each pileus is borne on two or more distinct stems, or perhaps the pilei 

 of two or more stems are consolidated into one, but they do not seem 

 to have that appearance. 



INSULARIS (Fig. 412). Pileus 3 cm. with a strongly wrinkled, 

 dull, mat surface. Pores large, pale cinnamon, in the "type" mostly 

 torn and destroyed. Stipe mesopodal with mat, finely velutinate sur- 

 face. Spores large, oval, 12x16, minutely but distinctly rough. 

 Known from a single specimen at Paris from New Caledonia. 



7. POLYSTICTUS, PLANTS WITH THIN PILEI AND 

 PORE LAYERS. 



Spores of some species said to be globose, colored, but I have rarely found them, Mid hence can not 

 state from my own knowledge. Context and pores colored, brown. Hyphae colored. I suspect some at 

 least have hyaline spores. 



a, PORES LARGE. 



GRACILIS (Fig. 414). Pileus lateral (or unilateral) thin, dark 

 reddish brown, with dull surface. Stipe slender (1-2 mm. thick by 

 5-15 cm. long) with a dull surface, proceeding from a rhizome or 

 buried rootstalk. Pores large, I mm. in diameter, round or hexagonal. 

 Spores not found by me. This is a unique species only known from 

 the original collection, Spruce, Brazil. It was classed by Berkeley in 

 the genus Hexagona where it really belongs on its pore characters 

 alone. However, there is no other similar species in the genus Hex- 

 agona, and in its habits, context, surface, also spores probably, it 

 is evidently so close to this section Amaurodermus that it should be 

 placed here. 



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