Polyporaceee 



Boletus. 3 . Stem not viscid 4 



4. Plant growing on Scleroderma B. parasiticus 



4. Plant terrestrial 5 



5. Tubes greenish-yellow B. alutaceus 



5 . Tubes golden-yellow B. tenuiculus 



6. Pileus reticulated with subcutaneous brown lines. .B. dictyocephalus 



6. Pileus not reticulated 7 



7. Tubes changing to blue where wounded B. pallidus 



7. Tubes not changing to blue 8 



8. Stem uniformly colored B. subglabripes 



8. Stem yellowish, streaked with brown B. innixus 



Peck, Boleti of the U. S. 



B. minia'tO-oliva'ceilS Frost olive-red. Pileus at first convex and 

 firm, then nearly plane, soft and spongy, glabrous, vermilion, becom- 

 ing olivaceous. Flesh pale-yellow, changing to blue where wounded. 

 Tubes bright lemon-yellow, adnate or subdecurrent. Stem glabrous, 

 enlarged at the top, pale-yellow, brighter within, sometimes lurid at the 

 base. Spores 12.5x6^. 



Var. sensi'bilis (Boletus sensibilis Rep. 32, p. 33). 



Pileus at first pruinose-tomentose, red, becoming glabrous and ochra- 

 ceous-red with age. Tubes bright-yellow tinged with green, becoming 

 sordid-yellow. Stem lemon-yellow with red or rhubarb stains at the 

 base, contracted at the top when young, subcespitose. Spores 10-12.5 

 x4-5^. 



Pileus 2-6 in. broad. Stem 3-4 in. long, 3-6 lines thick. 



Woods and their borders. New England, Frost ; New York, Peck. 



Though the sensitive Boletus differs considerably in some respects 

 from the olive-red Boletus, it is probably only a variety, and as such I 

 have subjoined it here. In it every part of the plant quickly changes 

 to blue where wounded, and even the pressure of the fingers in handling 

 the fresh specimens is sufficient to induce this change of color. I have 

 not found the typical plant in New York, but specimens received from 

 Mr. Frost are not, in the dry state, distinguishable from the variety. 

 Peck, Boleti of the U. S. 



Indiana, H. I. Miller \ West Virginia. Haddonfield, N. J. Chelten- 

 ham, Pa., Mcllvaine. 



Years ago I marked it edible and excellent when young. My friends 



424 



