78 



1. P. Torulosus, Fr. Kromb., t. 42, figs. 3-5. On old stumps. 

 Batheaston. 



2. P. CoQchatus, Fr. Kromb., t. 42, figs. 1, 2. On old stumps. 

 Chippenham. 



3. P. Stypticus, Fr. Sow., t. 109. Kromb., t. 44, figs. 13-17. 

 Common on stumps of oak. 



Genus 15. Xerotus.* Fr. 



Hymenophore confluent with the stem ; gills tough or coriaceous, 



dichotomous ; edge obtuse, entire. 



Genus 16. ScHizopHTLLUM.t Fr. 



Gills coriaceous, split longitudinally, with the two divisions 



revolute, or spreading. 



Genus 17. Lenzites.J Fr. 



Corky or coriaceous ; gills firm, often anastomosing, and forming 



spurious pores ; edge entire. 



1. L. Betulina, Fr. B., pi. 15, fig. 3. Sow., t. 182. On stumps 



and rails ; very common. 



Order J I Polyiiorei.^^ 

 Hymenium, or fructifying surface, spread over the interior of pores 

 or tubes, and inferior, or turned downwards ; the pores are 

 generally persistent, but sometimes torn up, and forming con- 

 centric folds or teeth (not radiating as in Agaricini), but where 

 this is the case pores are visible in the young margin. In the 

 Order Polyporei, Mr. Berkeley observes, in his " Introduction to 

 Cryptogamic Botany," " The size, length and division of the 

 hymenial processes afford an infinite variety of characters. 

 Where the tubes are only slightly connected, we have a Boletus ; 

 where they are thin but not separable from one another, we have 

 a Polyporus : where the trama (substance intermediate between 

 the hymenium in the gills of Agarics, or pores of Polyporus) is 

 thick, and passes sensibly into the substance of the pileus, a 

 Trametes. In Fistulina, the pores are, from the first, perfectly 



* Xerotus, from xeros, dry. 



t Schizopliylluin, from schizo, I cut, and phyllon, a leaf. 



X Lenzites, from Lenz, a distinguished botanist. 



II Polyporei, from polus, many, and poros, a pore, or passage. 



