146 CORTINABIUS 



6-7 x 4/u.. Taste very acrid. Often caespitose. Pastures, and woods, 

 especially beech, and oak. Sept. Oct. Not uncommon, (v.v.) 



373. C. (Phleg.) causticus Fr. Bull. Soc. Myc. Fr. xxvi, t. 5, figs. 1-4. 



tcava-Tircos, burning. 



P. 3-5 cm., ochraceous nankeen yellow, almost hemispherical, then 

 convex, and plane, sometimes slightly umbonate, and finally slightly 

 depressed at the centre, pellicle easily separable, at first covered with 

 the white fibrils of the universal veil, soon white pruinose, silky to- 

 wards the margin, only slightly viscid when young, soon dry and shining ; 

 margin slightly incurved, then straight. St. 5-8 cm. x 3-5 mm., 

 white, straight, or flexuose, firm, elastic, covered with the fibrillose 

 veil, and slightly viscid when young, soon dry, very minutely pruinose 

 at the apex; base equal, or somewhat bulbose, sometimes fusiform 

 and slightly rooting. Cortina white, fugacious. Gills cream colour, then 

 ochraceous rust, broadly adnate, slightly emarginate, diminishing in 

 width towards the margin, slightly crowded. Flesh yellowish when 

 young, becoming whitish when dry. Spores ferruginous in the mass, 

 yellowish brown under the microscope, elliptical, 6-5-7'5 x 4/>i, apicu- 

 late, very minutely verrucose. Smell rather strong. Taste of the 

 cuticle of the pileus very bitter, of the flesh sweet, or very slightly bitter. 

 Pine woods, and under conifers. Sept. Oct. Not uncommon, (v.v.) 



374. C. (Phleg.) crystallinus Fr. Grevillea, t. 107, fig. 3. 



icpvaraXkivos, crystalline. 



P. 1-5-4 cm., shining silvery white towards the margin, disc watery- 

 pallid, becoming altogether shining white when dry, fleshy, convex, then 

 plane, hygrophanous. St. 5-7 cm. x 6-10 mm., whitish, then straw 

 colour, fragile, equal, or attenuated at the base, fibrillose. Gills day 

 colour, emarginate, thin, 6 mm. broad, crowded. Flesh white, thin. 

 Spores clay colour, elliptical, 4-5 x 3/n, "7-8 x 4-5 /M, faintly punc- 

 tate" Rick. Taste very acrid. Woods, especially beech. Sept. Nov. 

 Uncommon, (v.v.) 



375. C. (Phleg.) decoloratus Fr. Cke. Illus. no 726, t. 729. 



Decoloratus, stained. 



P. 4-10 cm., day colour, disc darker, thin, equally fleshy, cam- 

 panulate, then convex, obtuse, soft, soon dry, and fiocculose, corru- 

 gated and stained when old. St. 5-10 cm. x 10-12 mm., silvery, equal, 

 thickened at the base, sometimes attenuated downwards, fibrillose. 

 Cortina white, fibrillose, inferior. Gills whitish, or bluish, then day 

 colour and cinnamon, emarginate, adnate, or decurrent, not much 

 crowded, 6 mm. broad. Flesh white, watery, soft. Spores pale ferru- 

 ginous, pip-shaped, 11-12 x 5-6/i, verrucose. Taste slightly acrid. 

 Woods, especially beech. Aug. Oct. Not uncommon, (v.v.) 



