280 OUTLINES OF BRITISH FUXGOLOGY. 



K Cariosi. — Stem externally never reticulated, internally stuffed 

 with a spomjy pith, at length commonly holloio ; tubes at first 

 v^hite, then often light yellowish ; j^ores minnte, round ; spores 

 white. 



46. B. cyanescens, Bull. (p. 236) ; 2-5 in. 



47. B. castaneus, Bull. (p. 236) ; 2-3 in. Epping Forest. 



48. B. fulvidus, Fr. ; pileus convexo-plane, rigid as well 

 as the stem, which is stuffed, then hollow, equal, firm, even, 

 smooth, shining, growing dusky ; flesh white, then yel- 

 lowish ; tubes free, elongated ; pores white, then lemon- 

 yellow. — Rostk. t. 45. 



Under trees. Kew. 



Subgenus i. Gyrodon, Opat. — Pores sinuous or gyroso-plicate ; 

 tubes very short, slightly ad?iate to hymenoj>hore. 



No British species recorded. 



Subgenus ii. Boletinus, Kalch. — Hymenophore not even, hut with 

 projecting points which descend like a trama between the tubes ; 

 stem anmdate. 



No British species recorded. 



Of uncertain affinity. 



49. B. carnosus, Bostk. ; compact ; pileus fuscous, pul- 

 vinate, smooth ; flesh pallid, dirty yellowish ; stem short, 

 firm, somewhat striate, rufesceut, light yellow ; tubes ad- 

 nate, depressed round stem, dark yellow ; pores rather 

 large, angular, same colour. — Rostk. t. 14, 



In woods. Stoke Poges. 



Genus 22. STROBILOMYCES B. (p. 236.) 

 1. S. strobilaceus, B. ; 2—1 in. 



Genus 23. FISTULINA (p. 2:^7 .) 

 1. P. hepatica, Fr. ; 6-12 in. 



