202 EHPOET OK THE STATE liOTANIST 



like the pileus; spores oval or oroadly elliptical, pale-yellow^ 

 .00(14 to .0005 in. long. 



The Chestnut boletus is unlike any other species here described, 

 in having a hollow stem. Its cap is at first convex, but it becomes 

 expanded with age and sometimes the margin curves upward, as 

 shown in figure i. There is a minute velvety down on its sur- 

 face, which is scarcely noticeable except to a close observer. The 

 cohjr is generally reddish-tawnj'^ or cinnamon. It is not always 

 as dark as is indicated by the name. 



The tubes are small and short. At first they are white, but 

 they become yellowish as the plant matures. 



The stem is short and not always straight. It is clothed and 

 colored like the cap. Sometimes it tapers towards the top. 

 When young it is soft and spongy in the center, but it becomes 

 cavernous or hollow when old, as shown in figure 6. Its pale 

 yellow spores are also a peculiar feature. 



Some species of this genus quickly assume bluish tints where 

 the substance is bruised or broken. The rule is sometimes given 

 to avoid all such as poisonous. And yet oie correspondent, an 

 enthusiastic mycophagist, informs me that he eats such species, 

 and has done so repeatedly without harm. In one instance how- 

 ever, which was brought to my notice, sickness and vomiting 

 followed the eating of the Sensitive boletus, Boletus sensibUis, 

 a species which assumes a blue color in a remarkable manner 

 where bruised, cut or broken. Even the pressure of the fingers 

 in handling it causes it to assume blue spots where touched. All 

 the family partaking of it were made sick, but all recovered. 



Polyporus Mich. 



In members of the genus Polyporus the stratum of pores is not 

 smoothly or easily separable from the caj). Most of the species 

 grow on dead or decaying wood and are too tough for food. A 

 few grow on the ground, but even these are inclined to be tough. 

 Very few of the wood inhabiting species have a central stem and 

 many have no stem at all. In some the te.Kturo is dry, hard, 

 corky or woody, such as no one would think of eating, and of 

 those classed as edible, it is generallj' better to select only the 

 very 3'()ung plants for food. My personal experience with these 

 has not extended be3'ond the single species here described. 



