Jakob E. Lange: Studies in the Agarics of Denmark. III. 



SYSTEMATIC AND FLORISTIC NOTES. 



A. TRICHOLOMATÆ. 

 a. CORONATÆ. 



1. P. cervinus (Schaeff.). 



Spores broadly oval (or subrotund-ovate), generally 7 -7 1 ., -5— 5 l Lu. 

 Cystidia on edge of gills: inflated, oblnse or somewhat pointed, 

 20 — 25 u broad; on the sides: bottleshaped fusoid, about 15 — 16 jli 

 broad, apex with 3 — 4 hooks 



Figured specimens: Hjallese, on slump of Fagus, Oct. 1895. — 

 Common, but solitary, especially on rotten stumps of Fagns, but 

 also to be met with in coniferous woods. 



This is (a rather dark specimen of) the typical form of this 

 species, in which the cap is almost smooth, the stem, especially 

 downwards, clad with more or less fuscous fibrils (in small 

 specimens almost entirely white). - - But besides this common 

 type I have met with several others. On a big heap of sawdust 

 (at Ry, Jylland) I have found a very robust form which was 

 very much like Cooke's figure of P. eximius (Saund. et Smith) 

 except for the want of the miniate edge. -- And in a hedge 

 (Hjallese) I have seen a large form (which might be called var. 

 svaber) in which the stem was everywhere set with black woolly 

 squamules å la Boletus scaber, but coarser. 



[P. umbrosus (Pers.) sensu Bresadola (Fungi Tridentini tab. 116) 

 which is very closely related to P. cervinus, especially the last- 

 named variety, I have never mel. Ils corniculate cystidia show 

 that it belongs here and distinguish il from P. umbrosus (auct. 

 div. , no. 9.] 



2. P. salicinus Pers . 



Spores broadly ovate, 8 5 1 /,, u. Cystidia on edge: inflated 

 clavate, 16— 18 u broad; on sides: fusoid-bollleshaped, with hooks. 

 Basidia 4-spored. Filaments on umbo about 12 u diam., formed 

 of elongated cylindric cells with pale fuscous content. 



Fig. specim.: Søby Søgaard, in wood, on a rotten branch (of 

 Fagus), Sept. 1913. Also found at Lammehave (1913) and on 

 Salix capræa in wood near Kværndrup, Sept. 1916. 



Fairly typical. Chiefly distinguished from small specimens of 

 P. cervinus by ils glaucous-gray, in the middle slightly luscous- 

 squamulose cap. P. salicinus in the sense of Ricken does 



not belong here but to group ß. 



3. P. petasatus Fr 



Spores broadly oval 7' ,,,— 9 x 4 1 /.— 5 u. .1914: 7-7 ] / 2 X 5). Cy- 

 stidia lusoid-bottleshaped, 11 — 14 u broad, apex with some few 



