36 Dansk Botanisk Arkiv, Bd. 2, Nr. 11. 



although it is said to grow »in silvis inter folia pinea putrescentia«. 

 The chief characters of this plant are as follows : Cap conic-convex, 

 with a minute, at last disappearing, papilla, 2 — 4V 2 cm broad, 

 somewhat pellucido-striatulate, dingy brownish (when dry paler 

 and silky). The edge of the cap extends a little over the gills 

 and is at first somewhat inflexed. Stem tall (8 — 12 cm), slender 

 and straight, silky, striate, paler than the cap, slightly thickened 

 towards the base which about 2 cm up is clad with a pure 

 white cobweb-like tomentum. Gills ventricose, almost free, at first 

 whitish then incarnate-pallid. It has a faint smell of cucumber. 



5. R. infula Fr. 



Spores 8 — 9 x 6 u, oval, rather prominently angular-wavy. Basi- 

 dia 4-spored. Cystidia 0. 



Fig. specimens: Sanderum, boggy pasture, Aug. 1909. Not 

 uncommon. 



This species has much in common with no: 6, but the gills 

 are pure white at first, then rosy-incarnate. 



6. R. mammosus (L. ?) Fr. 



Spores 9^2 — lOVs x 7 — 7^2 u ; subovate, obtusely angular-wavy. 

 Basidia 4-spored. 



Fig. specimens: Gerup, near Holstenshus, amongst grass, bor- 

 der of road through wood of Picea, Aug. 1902. Not uncommon, 

 especially on hill-slopes etc. My plant is identic with the form 

 figured by Fries (Icones selectæ). What the larger form men- 

 tioned in the text as figured by Bulliard is, I do not know 

 (vide no : 4). — R. papillalus Bres. is probably identical. 



7. R. clandestinus Fr. 



Spores 11 — 12^2 x 7 — l 1 ^ u., oblong, irregularly wavy-angülar. 

 Basidia 4-spored. 



Fig. specimens : Vasemose near Holmstrup, grassy slope out- 

 side a wood, Sept. 1902. — My plant differs somewhat from 

 other descriptions of B. c, and I therefore add a short diagnosis: 



Cap about l x / 2 cm, at first conic-convex, then slightly depressed 

 with a small papilla, sootbrown, indistinctly striate (when dry 

 silky-fibrillose, grayish-brown). Stem short, comparatively stout. 

 (2 — 3 cm x 2 — 3 mm), grayish-brown, hollow, smooth and even. 

 Gills thick, distant, broader towards the stem and broadly adnate, 

 grayish-brown. Smell none. 



8. R. fumosellus Wint. 



Spores very large (14—18 x 7 l / 2 — 9 u), oblong-ellipsoid, wavy- 

 angular. Basidia 4-spored. 



Fig. specimens: Lykkesholm, in a bog under Alnus, Sept. 1909, 

 solitary. Cap 0,9 cm, conic-convex, coarsely pellucido-striate, 

 sootbrown, sparsely clad with minute, pallid, flocculose fibrils. 

 Stem 4 cm x 1 mm, of the same colour, with pallid, minute 



