POLYPOREAE OF SOUTH AFRICA. 255 



Pileus stipitate or sub-stipitate. 

 8. Stipe central, arising from a false sclerotium composed 



of agglutinated soil particles. P. arenosobasii* 32 



8. Stipe not arising from a sclerotium. 



9. Pileus and hymenium deep cinnabar red. 



P. sanguineus 25 

 9. Pileus and hymenium not as above; yellow or orange; 

 plants densely imbricate; fleshy; context soft, of a 

 cheesv consistency and friable when dry. 



P. sulphureus 33 

 9. Context floccose. P. colossus 30 



Series III. 



Context some shade of brown. 



Pileus stipitate. 



Surface laccate ; spores coloured, truncate. 

 2. Surface of pileus and stipe black, laccate. 



P. nigro-lucidus 35 



2. Surface of pileus and stipe a red or chestnut, laccate. 



3. Mouths reddish-purple. J J . mastoporus 36 



3. Mouths white or yellowish. P. lucidus 37 



Pileus sessile. 



4. Surface laccate, spores coloured, truncate. 



5. Mouths reddish-purple. /'. mastoporus 36 



5. Mouths white or yellowish. P. lucidus 37 

 4. Surface not laccate; spores not truncate, hyaline or 



coloured; setae absent or present. 



6. Context wholly or in part brittle; setae in walls of 



tubes. 



7. Context of same consistency throughout and brittle; 



spores coloured; setae present. P. patouillardii 39 



7. Context soft above, hard and brittle below; spores 



coloured, setae present. P. ochroporus 40 



6. Context not brittle. 



8. Setae present. 



9. Surface with a dense velvety pad of reddish brown 



hairs. P. tabacinus 38 



9. Surface not with such a pad, minutely pubescent, 



smooth to very rough. P. (jilrus 41 



8. Setae absent. 

 10. Pileus spongy; context duplex, upper region soft and 



contrasting with firm tubes ; plants most frequently 



encircling twigs. P. fruticum 42 



10. Pileus not as above. 



11. Context purple and whole plant concolorous. 



P. vinosus 43 



11. Context olive brown. 



12. Surface glabrous, fawn coloured to olive. P. aratus 44 

 12. Surface variously pubescent. Vide Trametes protect 



