254 TOLYPOREAE OF SOUTH AFRICA. 



27. Pileus more firm and rigid, surface hirtose to villose 



tomentose or subglabrous, mouths 4 to 6 to mm. 



P. velutinus 15 

 21. Surface minutely tomentose to glabrous. 



28. Entire plant grey, surface finely tomentose, pruinose, 



pore mouths 4 to 5 to mm. P. durbanensis 20 



28. Plants not grey. 



29. Context friable in dry plants. 



30. Plants growing densely imbricate and forming large 



masses; pileus fleshy when fresh, yellow to orange or 

 white, context of a cheesy consistency and friable 

 when dry, tubes develop easily on any part of pileus. 



P. sulphureus 33 



30. Plants not growing densely imbricate; pileus fleshy 



when fresh, white; context fragile and crumbly when 

 dry; tubes not forming readily as above. 



P. immaculatus 22 

 29. Context not friable as above. 



31. Plants growing densely imbricate; pileus thin (less 



than 1 cm.), surface finely tomentose, creamy white 

 to yellow; pore mouths 5 to 6 to mm. 



]'. trichiliae 21 

 31. Plants rarely imbricate; pileus large, exceeding 1 cm. 

 in thickness; surface white to discoloured; spores 

 large, globose. P. robiniophila 23 



Series II. 

 Context yellow or red. 



1. Pileus sessile. 



2. Pileus and hymenium deep cinnabar red. 



3. Pileus less than 5 mm. thick. P. sanguineus. 25 



3. Pileus more than 5 mm. thick. P. cinnabarinus 26 

 2. Pileus and hymenium not deep cinnabar red. 



4. Surface densely tomentose or hispid. P. occidentalis 27 

 4. Surface covered with a thick pad of coarse, branched 



fibrils. P. leoninus 28 



4. Surface of pileus not as above. 



5. Context cheesy and friable, crumbly when dry; pileus 



fleshy. P. sulphureus 33 



5. Context floccose, soft-spongy. 



6. Pileus circular, tubes as much as 3 mm. long. 



P. mollicamosus 29 



6. Pileus pulvinate ; tubes not exceeding 1 cm. in length. 



P. colossus 30 

 5. Context not as above. 



7. Plants largely resupinate; pileus small, buff coloured; 



context pinkish buff; spores hyaline ellipsoid. 



P. conchatus 31 

 7. Pilei well developed; context yellow or yellow brown; 



spores hyaline, globose. P. anebus 34 



