16 Dansk Botanisk Arkiv, Bd. 2, Nr. 7. 



6. C. butyracea (Bull.). 



Spores ovate-lanceolate, 6V2 — ~ l x 3 — 3 3 / 4 u. 



Fig. specim. : Hjallese, wood of Fagus, Okt. 1896. — Very com- 

 mon (often forming »fairy-rings«) as well in beechwoods as in 

 coniferous woods. This species varies very much especially in 

 colour. In woods of Fagus the paler (occasionally almost white) 

 form (fig.) is the predominating type; while the very dark rufo- 

 fuscous or almost sootbrown form is common in our coniferous 

 woods. This latter type often has the stem (all over or from the 

 base upwards) clad with short, adpressed, pallid hairs. This pro- 

 bably constitutes Ag. trichopus Pers. 



7. C. fusipes (Bull.). 



Spores varying from 5 — 8 u 1., 3 — 4 u broad. Cystidia crowded, 

 hairshaped (somewhat wavy), about 2u broad. (1911: Spores 

 5—6 x 3 1 /*— 4 u). 



Fig. specim. : Aarup, fasciculate on and around a stump in 

 wood of Fagus, Oct. 1896. -- Also found in »Purreskov« near 

 Hesselager, Aug. 1911, about a living beech. 



As shown in my figure the fructifications spring from an as- 

 cending, rhizome-like black rhizomorpha. The figured form is 

 most nearly Ag. oedematopus SchaefY., while the specimens found 

 in 1911 belonged to a more slender-stemmed, pale form (cap the 

 colour of calfskin) almost answering to the description of Ag. 

 contortus Bull. But they are hardly specifically distinct. 



p\ LÆVIPEDES. 



a. Viscidce. 



8. C. velutipes (Curt.). 



Spores: in figured specimens: 9 — 12 x 2 l l 2 — 4 u (uncommonly long); 

 in most cases: 7*/ 2 — 10 x 3'/ 2 — 4 u, cylindric-ellipsoid. Cystidia 

 conic, rather acute, almost subulate, 8— 12 (J. broad, protruding 

 part 18 — 30 u long. The velvet coaling on the slem is made up 

 of long, wavy, about 4 u broad, yellow-brown hairs. 



Fig. specim.: Tarup near Odense, on stump of Fraxinus, 

 Sept. 1895. 



Common, often fasciculate, especially on fresh stumps and 

 living trunks of Ulmus, Fraxinus and Populus. Also parasitic 

 on Sambucus racemosus etc. Only once 1 have met with this 

 species on coniferous wood (a single small specimen on a pole 

 (of Picea)). — Occasionally it is quite dwarfy; I have seen a 

 form, in which the cap was only 14 mm, the whole plant pale 

 yellow. 



b. Siccæ. 



9. C. dryophila (Bull). 



Spores 5 x 3 ! /4 M- Cystidia rather inconspicuous, somewhat wavy 

 (and occasionally branched), hairshaped or slightly inflated. 



