12 Dansk Botanisk Arkiv, Bd. 2, Nr. .'5. 



are much more diversified and often afford an excellent means 

 for identification. Not only they differ widely in size (from 

 16 x 10 u down to 3 x 2 u) and shape (from narrow ellipsoid to al- 

 most spheric), but in some few species they also deviate from 

 the ordinary type by being verruculose or sub-spinulose. Two- 

 spored basidia — as in numerous species of Mycena and Om- 

 phalia — I have never observed in this genus. 



The number of species found and figured in »Danmarks 

 Agaricaceer« is 28. This is not alle the Danish species. Sev. 

 Petersen (loc. cit.) enumerates several others While some of 

 these are very doubtful natives (or very dubilable species) others 

 are distinct and really belong to our flora. Thus f. inst. C. lon- 

 (jipes, C. globularis and C. Micheliana have been found by him 

 and other mycologists, but I have not seen them. 



KEY 



TO THE SPECIES FIGURED OF THE GENUS COLLYBIA. 



I. ARMILLARIA. 

 The stem with a distinct ring. 



Surface of cap gelatinous. Spores very large, globose . . . C. (Ar miliaria) mucida 1 



II. EU-COLLYBIA. 



No trace of veil or ring. 

 A. Læticolores. Gills generally white or yellowish. 



a. Striæpedes (Fries). Stem distinctly striate or grooved; rather large 

 fungi, v stem 5 mm or more . 



a. macrosporæ. Spores large ,6« or more broad . 



1. Spores about 10 u broad; stem generally with a long 



tapering »root« (.. radicata (2) 



2. Spores (5 — 7, u hroad; stem truncate with creeping, 



white root-like mycelium -strings . C. platyphglla 3 



b. microsporæ. Spores rather small less than 5 u broad). 



1. Spores globose. 



* Whole plant, when fresh, white or pale yellowish C.maculata 4 

 s. Cap rufous C.distorta (5) 



2. Spores ovate or ellipsoid. 



* Stem somewhat conical; gills crowded ('. butyracea i,6) 



a; Stem sub-fusiform, rooting gills distant C. fusipes (7) 





