CONTEXT AND PORES COLORED. 



endocrocinus. The yellow coloring matter is not soluble in water, 

 but readily so in a potash solution. This must be an unusual species 

 in our Western States. It has never reached us, nor is it found at 

 New York. 



Fig. 698. 



Polyporus substygius. 



POLYPORUS SUBSTYGIUS (Fig. 698). Pileus thin, rigid, 

 2-3 mm. thick. Surface smooth, brown, with narrow, raised, hard, 

 concentric zones. Context brown, thin. Pores minute, hard, concol- 

 orous, 1-1^2 mm. long. Setae abundant, with slightly thickened base. 

 Spores (?) globose, 3-4 mic., pale colored. 



The above notes are made from type at Kew, a single specimen 

 from Ceylon. Others of Cooke's naming, from Malay, appear to us 

 to be the same, though the pileus is evidently velvety. We have also 

 same plant from Philippines (referred to Polyporus gilvus originally). 

 In Samoa our collections are also distinctly velvety, and part of the 

 collection we should have referred to Polystictus tabacinus. Polyporus 

 substygius is quite close to Polystictus tabacinus, and we are not sure 

 they are distinct. Substygius is not flaccid, but hard and rigid; but 

 for all that is probably better classed as a Polystictus (compare also 

 Polyporus spadiceus in Section 99). Polystictus tabacinus is supposed 

 to have hyaline spores, and we are not sure but that Polyporus sub- 

 stygius also has. 



SPECIMENS. Abundantly from Samoa, which seem to run into tabacinus. 



B. Surface smooth, or at length smooth. 



POLYPORUS PLORANS. Pileus sessile, dimidiate, large, 

 10-50 cm. Surface velutinate, at length smooth. Context reddish 

 brown, light, friable. Pores medium, ^-1 mm., very long, 3-6 cm., 



364 



