SOME SIXGAPOKE BOLBTIXAE. 69 



some secondary septa: septa thin and unlined; hymenial 

 surface narrowly but very deeply sinuate next stipe, the 

 stipe free to the pileus.; pileus 4.5 em. in diameter: stipe 

 6 — 12 mm. x 1-1- cm. : spores brown, ovoid, with narrow 

 longitudinal raised hands. 13 — 15 x 8 — 10 microm. (Xo. 

 4992). 



Boletopsis singaporensis, sp. nov. 



Section IT. Without distinguishable veil or annulus even in 

 young plants : springing from either white or yellow mycelium 

 (Boletus, Phylloporus; Struuilomyces). 



A. Pores large, very irregular and largely compound, with thin 

 septa and with short secondary septa subdividing the larger 

 pores into two or three. 



B. Hymenial surface decurrent on to stipe : plants solitary. 

 from bright yellow mycelium: pileus leather colored, 

 minutely roughened, opaque: hymenium sordid yellowish : 

 stipe pale below, thickly streaked with reddish brown 

 above : flesh of pileus and stipe cream colored, not chang- 

 ing ; pileus 4.5 — 6 cm. m diameter: stipe slender 4 — S 

 mm. x 3.5 — 5.5 cm. : spores elliptical, smooth, very pale. 

 G— 8 x 4 — 1.5 microm. (Xo. 4993). 



Boletus aureo-mycetinus, sp. nov. 



BB. Hymenial surface deeply and rather broadly sinuate next 

 stipe; plant in groups of 2 -to 4 or more, from a white 

 mycelium : pileus rich velvety bay : hymenium grey : stipe 

 pale brownish nearly smooth : flesh of pileus and stipe 

 white, not changing : pileus T — .10 cm. in diameter, stipe 

 greatly inflated, 2.5 — 1.5 cm. x 8 — 10.5 cm. : spores ovoid, 

 smooth, nearly white, 6x5 microm. : cystidia numerous, 

 very prominent, rigid and reddish, 60 x 10 microm.. thus 

 resembling the cystidia of Hymenochaete. (Xo. 4994). 



Boletus spinifer, sp. nov. 



AA. Pores large, to medium, or small, more regular, largely simple. 

 B. Flesh not changing to blue on bruising : pileus smooth 

 or nearly so. 

 C. Plant springing from white mycelium. 



D. Pileus some shade of brown or sooty brown: 

 stipe white to brownish or drab. 

 E. Pileus minutely mealy or velvety, dry, 

 opaque, never smooth and shining. 



F. Pileus sooty-mealy, or velvety, quite 

 blackened with this over the umber 

 ground color. 

 G. Flesh white, not changing. 



R. A. Soc, No. 78. 



