PROPERTIES OF CRYPTOGAMIC PLANTS. 99 



recommends only young specimens, old ones having frequently 

 proved injurious. M. Roques considers tlie use of it as hazardous. 

 " Great caution would be required in distinguishing some states 

 from B. luridiis?'' Crypt. Eng. Its poisonous properties were 

 known to the ancients. Pliny mentions that Annseus Serenus, 

 the captain of Nero's guard, died from eating it. Koques, Hist, 

 des Champs. Yen. 153. 



Boletus alhus, Pers., Champ. 233. 

 Suilhis esculentus, crassus, Mich., Gen. PL 

 See B. edulis^ to which the common name GejpjpateUo huono is 

 applied among the Italians. It has the taste of a good mushroom. 

 Roques, Hist, des Champs. 147. 



Boletus felleus, Bull., Cham23S. 379 ; Pers., Syn. Found in 

 woods, in August, S, C. ! to Pa. 



It diifers by the red tint of the pulp from the edible Boletus, 

 and is excluded from the  number of the edible mushrooms. 

 Eoques, Hist, des Chamj^s. Comest. 149. 



Boletus jpacTiyims^ Fr. Thick-stemmed Boletus. Pine woods. 

 July and Sept. 



Taste and smell like that of Agaricits Georgii' the yellow, 

 expressed juice distinctly acid. Crypt. Eng. 



Boletus cyanescens, Bull. 369 ; D. C. ) White-seeded Boletus. 

 " constrictus, Pers., Syn. 508. ) Woody places. Sept. 



Though in general we attribute poisonous qualities to those 

 mushrooms which change their color upon being bruised, this 

 should not be considered a rigorous rule, to be followed on all 

 occasions. It is prudent, however, says Eoques, to rank the azure 

 Boletus among the suspected species. Hist, des Champs. Suspect, 

 et Yen. 150. 



Boletus lu/ridus^ Schoeff. 

 " ruheolarius, Bull. 

 " hovinus, Bolt. 

 " jpernicios'us, Eoques, Hist, des 



Champ, 

 " marmoreiis, Eoques, Hist, des 



Champ. 141. 

 Yery deleterious. M. Eoques mentions a case which came 



Poisonous Boletus. 

 Woods. Summer & 

 Autumn. N. C, to 

 Pa, 



