58 FETCH : REVISIONS OF 



old sodden specimens of cyanascens, slightly stained blue in 

 parts : Berkeley and Broome give the size of the spores as 

 9iu, but, according to Saccardo, caliginosus should have 

 spores 16-18 x 10 ^t- Two specimens on another sheet, 

 gathered in January, are apparently not recorded by Berkeley : 

 they are labelled P. papilio7iaceus and P. cyanascens, but are 

 much larger (17 cm. high) than the other specimens : their 

 spores are 17-19 x 13-15/^ : this is probably another species 

 altogether. Berkeley says that the spores of P. paiyilionaceus 

 from Ceylon " vary from -0007 to '0001 (inch) long " : he pro- 

 bably intended -0007 to '001 inch, which would be 17-25 /i : 

 we have no herbarium specimens with spores of this size. 

 It appears from this that Berkeley and Broome's specimens 

 of papilionaceus , cyanascens, and caliginosus were all cyana- 

 scens as Thwaites supposed, and that the records of the other 

 two for Ceylon were incorrect. The change of colour which 

 occurs on handling fresh specimens of cyanascens should have 

 prevented any mistake. Old specimens of cyanascens have 

 recently been gathered, which agree exactly with the drawings 

 marked caliginosus, Jungh. : these have a brownish pileus 

 and stem when sodden, but the pileus becomes ashy white in 

 drying. In such specimens the colour change takes place 

 very slowly. 



13.— Boietus portentosus, B. & Br. 



Pileus 18-22 cm. in diameter, smooth, greenish ohve, becom- 

 ing blackish olive in the centre , undulating or broadly convex , 

 centre depressed; flesh 3 cm. thick, pale yellow, spongy, 

 slowly turning blue in the lower haK when cut. 



Stalk 9 cm. high, about 6 cm. in diameter at the base, 

 narrowing to 4cm. in diameter at the apex, lacunose, 

 dark brown covered with a greenish-yellow bloom, tapering 

 abruptly to a point at the base, solid; flesh pale yellow and 

 spongy. 



Pore surface greenish yellow, edges of the pores brown. 

 Pores about "6 mm. in diameter, greenish yellow in section, 

 bright yeUow when young, 7 mm. deep, not decurrent. 



Spores greenish olive, broadly elliptical, 8-9 x 5-7/". 



