BOLETUS 573 



covered with rufous or greyish, mucronate flocci, attenuated upwards, 

 often tinged greenish when eaten by slugs or snails. Tubes dingy white, 

 free, long; orifice of pores often grey or blackish at first, minute, round. 

 Flesh white, often greenish near the cuticle of the stem, thick, compact. 

 Spores ochraceous, oblong fusiform, 16-18 x 5-7 p, 1-4-guttulate. 

 Smell and taste pleasant. Edible. Woods, heaths, and pastures. 

 July Nov. Common, (v.v.) 



1894. B. scaber (Bull.) Fr. (= Boletus nigrescens Roze & Rich. sec. 

 Quel.) Rolland, Champ, t. 87, no. 192. Scaber, rough. 



P. 5-20 cm., ochraceous fuliginous, greyish bistre, or brownish bistre, 

 hemispherical, pulvinate, smooth, viscid when moist, at length rugu- 

 lose, or rivulose ; margin at first furnished with a cortina. St. 7-20 x 

 24 cm., whitish, or greyish, rough with fibrous scales that become blackish 

 with age, often greenish or bluish especially towards the base when eaten 

 by slugs or snails, attenuated upwards. Tubes white, then dingy, free, 

 long; orifice of pores minute, round. Flesh white, watery, soft. Spores 

 ochraceous, oblong fusiform, 1618 x 5 6-5/z, multi-guttulate. Taste 

 pleasant. Edible. May Dec. Common, (v.v.) 

 var. niveus Fr. Rostk. Bol. t. 48, as Boletus holopus Rostk. 



Niveus, snow-white. 



Differs from the type in the white p. becoming greenish grey at the 

 disc, and in the white granularly punctate st. which becomes greenish grey 

 at the base. Spores pale ochraceous, oblong fusiform, 14-16 x 5/n, 

 multi-guttulate. Deciduous woods. Sept. Oct. Not uncommon, (v.v.) 



1895. B. nigrescens Roze & Rich. (= Boletus scaber (Bull.) Fr. sec. 

 Quel.) Trans. Brit. Myc. Soc. m, t. 20. 



Nigrescens, becoming black. 



P. 4-12 cm., yellowish, convex, tomentose, cracking with age. St. 

 6-11 x 2-4: cm., yellowish, dotted with grey scales, ventricose, attenuated 

 at both ends, striate. Tubes white, soon becoming bright yellow, free; 

 orifice of pores small, -5 mm. across, round, or oblong, unequal. Flesh 

 yellowish white, becoming red on exposure to the air, and finally dark 

 brown. Spores olivaceous, fusiform, 12-16 x 5-6/u, 1-3-guttulate. 

 Taste pleasant. Edible. Deciduous woods. July Sept. Uncommon. 

 (v.v.) 



1896. B. rugosus Fr. Rostk. Bol. t. 41. Rugosus, wrinkled. 

 P. 5-6 cm., bay, or brown, convex, pulvinate, dry, smooth. St. 



7-12 x 2-3 cm., whitish, or ochraceous, attenuated upwards from the 

 subbulbous base, longitudinally ribbed; ribs dark, anastomosing, or 

 reticulate. Tubes whitish, then ochraceous, free ; orifice of pores small, 

 round. Flesh white, reddish under the cuticle of the p., compact. Spores 

 olivaceous, fusiform, 9-10 x 3-4/z. Taste mild. Edible. Woods. 

 Aug. Oct. Uncommon, (v.v.) 



