3ß Dansk Botanisk Arkiv, Bd. 2, Nr. 3. 



species«, especially as the Coprini are even worse than the ordi- 

 nary agarics to bring safely home for study and to preserve. 



Their rapid developement and decay has also been a great 

 obstacle to my figuring of the ephemeral species. Some I have 

 had to cultivate in order to study and figure them in all stages. 

 And besides the species figured I have met with some few very 

 minute forms, which probably are distinct species, but which I 

 have not succeeded in figuring and identifying. Still I have 

 reason to believe that the 32 species figured represent the large 

 majority of the Danish species. The number at any rate con- 

 siderably exceeds that recorded in previous floras. 



Spores of all the species are figured on Plate II. 



KEY 



TO THE SPECIES OF THE GENUS COPRINUS FIGUBED IN 

 »DANMABKS AGABICACEEB«. 



Comati. Young cap covered with felt or scales (recurved or adpres- 

 sed) formed by filaments (which are made up of cylindric — or 

 irregularly branched — cells). 



a. annulati. Stem with a narrow ring (usually free, occasio- 

 nal!}' attached to base of stem). 



a. Spores 12—14 n long. Cap large (about 9 cm high 1 ) . C. comatus (1) 



b. Spores 15—23 n long. Cap smaller (2-5 cm high) . C. sterquilinus (2) 

 (3. exannulati. Stem without ring (occasionally with a ringlike 



zone near the base). 



a. subglabri. Cap almost naked, remnants of universal veil 

 forming inconspicuous, adpressed, brownish scales or cobweb- 

 like, orange filaments. 



1. Cap grayish, with adpressed scales (especially in the 



middle), rather large C. atramentarius (3) 



(There exists a smaller form (cap 3 cm high) almost devoid 



of scales: C. fuscescens Schaeff.?) 



2. Cap whitish, covered (like the stem) with cobweb-like, 

 orange-red filaments, 2—3 cm high C. dilectus (4) 



b. tomentosi. Young cap perfectly covered by (whitish) felt or 

 pilose scales. 



1. atrospori. Sporepowder almost black (individual spores 

 dark brown or black). 



l ) I generally give the height of the mature, but unexpanded, cap as the 

 most reliable measure in this genus. 



