Jakob E. Lange: Studies in the Agarics of Denmark. IV. 31 



Cap 4 — 7 1 o cm j conical, at last expanded and rather acutely 

 umbonate; flesh thin. The colour resembles that of darker 

 forms of R. rhodopolius. The edge is somewhat striolate. Stem 

 somewhat clubshaped, tall and rather slender, 9—10 cm x 4 — 8 

 mm (above) and 6 — 10 mm (below), striate, paler than the 

 cap (recalling R. (Nolanea) pascuus). Gills rather narrow, some- 

 what distant, free or almost free, at first pallid, then light trout- 

 red. Odour none. 



12. R. majalis Fr. 



Spores 7 — 10 x 7-8 u, subspheric, 5-(6-)angular. 



Fig. specimens: Hjallese, in copsewood, gregarious, May 1902. 



Cap dingy date-brown, margin slriolale, with a distinct umbo. 

 Stem striate, of a pale watery-gray colour, slightly hollow. 



13. R. nidorosus Fr. 



Not figured. Plants answering to the description of R. n. are 

 rather common in moist and close copsewoods, especially on 

 boggy ground under Salices. It is almost too close to no: 12, 

 only differing in want of umbo and in having a more pronoun- 

 ced* »nitric« odour. The stem is generally more slender. Micro- 

 scopically there is no difference. 



14. R. speculum Fr. 



Spores 9 x 6V 2 — 7 u, spheric-oval, irregularly 5-(6-)angular. 



Fig. specimens: Hjallese, gregarious in wood of Corylus and 

 Quercus, Sept. 1908." Not uncommon. - - My plants differ from 

 the description of Fries in having a (very faint) nitric odour. 

 Intermediate forms between 13 and 14 occur. 



15. R. elaphinus Fr. (?) var. radiatus (nov. var.) 



Spores 8— 9V 2 x 7— 77s u, subglobular-ovate, obtusely angular. 



Fig. specimens: Fruens Bøge, edge of a young plantation of 

 Fagus, Oct. 1902 (and Aug. 1903). 



Cap slightly fleshy, l 1 / 2 —2 1 / 2 cm, convex-expanding, with a 

 small, rather acute umbo, hygrophanous, coarsely radiato-striate 

 half way up, pale dingy date-brownish. Stem short (3 cm), pallid, 

 slightly hollow. Gills horizontal, rounded behind, pallid. 



This species is the smallest and most dwarfy form of the 

 series which begins with R. clypeatus and includes no: 9—15, 

 all of which run into each other without any distinct lines of 

 demarcation. — My plant differs very materially from the type 

 of Fries (gills not so broad, cap less fleshy, somewhat umbonate, 

 colour lighter etc.) and forms a transition to R. sericeus. 



16. R. sericeus (Bull) 



Spores 8 — 10 x 6—7 u, irregularly and obtusely angular, sub- 

 spheric-oval. 



Fig. specimens: 1) Trolleborg, drive in wood, amongst grass 

 and moss, Sept. 1900; 2) Hjallese, on old lawn, Sept. 1900. — 

 Common. 



